diff --git a/crlcore/src/ccore/CMakeLists.txt b/crlcore/src/ccore/CMakeLists.txt
index 728e51cd..42d6f7d6 100644
--- a/crlcore/src/ccore/CMakeLists.txt
+++ b/crlcore/src/ccore/CMakeLists.txt
@@ -20,7 +20,7 @@
                              ${CRLCORE_SOURCE_DIR}/src/ccore/ispd04
                              ${CRLCORE_SOURCE_DIR}/src/ccore/ispd05
                              ${CRLCORE_SOURCE_DIR}/src/ccore/iccad04
-                            #${CRLCORE_SOURCE_DIR}/src/ccore/cspice
+                             ${CRLCORE_SOURCE_DIR}/src/ccore/spice
                              ${CRLCORE_SOURCE_DIR}/src/ccore/lefdef
                              ${CRLCORE_SOURCE_DIR}/src/ccore/blif
                              ${CRLCORE_SOURCE_DIR}/src/ccore/alliance/ap
@@ -105,10 +105,11 @@
                                                ToolEngine.cpp
                                                GraphicToolEngine.cpp
                            )
-                      #set ( spice_cpps        spice/SpiceParser.cpp
-                      #                        spice/SpiceDriver.cpp
-                      #                        spice/Spice.cpp
-                      #    )
+                       set ( spice_cpps        spice/SpiceBit.cpp
+                                               spice/SpiceEntity.cpp
+                                               spice/SpiceParser.cpp
+                                               spice/SpiceDriver.cpp
+                           )
                        set ( bookshelf_cpps    bookshelf/BookshelfParser.cpp
                                                bookshelf/BookshelfDriver.cpp
                            )
@@ -296,7 +297,7 @@
                                         ${ispd04_cpps}
                                         ${ispd05_cpps}
                                         ${blif_cpps}
-                                       #${spice_cpps}
+                                        ${spice_cpps}
                                         ${lefdef_cpps}
                                         ${openaccess_cpps}
                              )
diff --git a/crlcore/src/ccore/crlcore/Spice.h b/crlcore/src/ccore/crlcore/Spice.h
new file mode 100644
index 00000000..d288e29f
--- /dev/null
+++ b/crlcore/src/ccore/crlcore/Spice.h
@@ -0,0 +1,41 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU/LIP6 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |         S P I C E  / Hurricane  Interface                       |
+// |                                                                 |
+// |  Author      :                  Jean-Paul CHAPUT                |
+// |  E-mail      :          Jean-Paul.Chaput@lip6.fr                |
+// | =============================================================== |
+// |  C++ Header  :  "./crlcore/Spice.h"                             |
+// +-----------------------------------------------------------------+
+
+
+#pragma  once
+#include <string>
+
+
+namespace Hurricane {
+  class Cell;
+  class Library;
+}
+
+
+namespace CRL {
+
+  using Hurricane::Cell;
+  using Hurricane::Library;
+
+
+  class Spice {
+    public:
+      static bool  save ( Cell* );
+      static bool  load ( Library*, std::string spicePath );
+      static void  clearProperties ();
+  };
+
+
+} // CRL namespace.
diff --git a/crlcore/src/ccore/crlcore/SpiceBit.h b/crlcore/src/ccore/crlcore/SpiceBit.h
new file mode 100644
index 00000000..16f9bb06
--- /dev/null
+++ b/crlcore/src/ccore/crlcore/SpiceBit.h
@@ -0,0 +1,144 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |         S P I C E  / Hurricane  Interface                       |
+// |                                                                 |
+// |  Author      :                    Jean-Paul Chaput              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Header  :   "./crlcore/SpiceBit.h"                         |
+// +-----------------------------------------------------------------+
+
+
+#pragma  once
+#include <cstddef>
+#include <string>
+#include "hurricane/Name.h"
+#include "hurricane/Property.h"
+#include "hurricane/Slot.h"
+#include "hurricane/Net.h"
+
+
+namespace Spice {
+
+  using Hurricane::Record;
+  using Hurricane::Name;
+  using Hurricane::DBo;
+  using Hurricane::Net;
+  using Hurricane::PrivateProperty;
+  class BitProperty;
+
+
+// -------------------------------------------------------------------
+// Class  :  "::Bit" (declaration).
+
+  class Bit {
+    public:
+      static const size_t  nindex;
+    public:
+                           Bit         ( BitProperty*, const Net*, size_t index, std::string name="" );
+                           Bit         ( size_t index, std::string name="" );
+                          ~Bit         ();
+             bool          isExternal  () const;
+      inline BitProperty*  getProperty () const;
+      inline const Net*    getNet      () const;
+      inline std::string   getName     () const;
+             size_t        getIndex    () const;
+      inline void          destroy     ();
+             std::string   _getString  () const;
+             Record*       _getRecord  () const;
+    private:
+      static ptrdiff_t    _offset;
+             size_t       _index;
+             std::string  _name;
+  };
+
+
+  inline std::string   Bit::getName () const { return _name; }
+
+
+  typedef  std::vector<Bit*>  BitVector;
+
+
+  struct GreaterBitByIndex {
+      inline bool  operator() ( const Bit* lhs, const Bit* rhs ) const
+      { return lhs->getIndex() > rhs->getIndex(); }
+  };
+
+
+// -------------------------------------------------------------------
+// Class  :  "Spice::BitProperty".
+
+  class BitProperty : public Hurricane::PrivateProperty {
+      friend class BitExtension;
+    public:
+      static  Name                _name;
+    public:
+      static  BitProperty* create          ( Net* owner, size_t index );
+      static  Name         getPropertyName ();
+      virtual Name         getName         () const;
+      inline  Bit*         getBit          ();
+      inline  std::string  getBitName      () const;
+      virtual void         onReleasedBy    ( DBo* owner );
+      virtual std::string  _getTypeName    () const;
+      virtual std::string  _getString      () const;
+      virtual Record*      _getRecord      () const;
+    protected:
+    // Attributes.
+      Bit  _bit;
+    protected:
+    // Constructor.
+      inline  BitProperty ( Net* owner, size_t );
+  };
+
+
+  inline BitProperty::BitProperty ( Net* owner, size_t index )
+    : PrivateProperty(), _bit(this,owner,index)
+  { }
+
+  inline Bit*         BitProperty::getBit     () { return &_bit; }
+  inline std::string  BitProperty::getBitName () const { return _bit.getName(); }
+
+
+// -------------------------------------------------------------------
+// Class  :  "Spice::BitExtension".
+
+  class BitExtension {
+    public:
+      static inline  size_t        getIndex  ( const Net* );
+      static inline  std::string   getName   ( const Net* );
+      static         Bit*          get       ( const Net* );
+      static         Bit*          create    ( Net*, size_t index=Bit::nindex );
+    private:
+      static const Net* _owner;
+      static Bit*       _cache;
+  };
+
+
+  inline size_t  BitExtension::getIndex ( const Net* net )
+  {
+    Bit* bit = get( net );
+    return (bit == NULL) ? false : bit->getIndex();
+  }
+
+
+  inline std::string  BitExtension::getName ( const Net* net )
+  {
+    Bit* bit = get( net );
+    return (bit == NULL) ? "?" : bit->getName();
+  }
+
+  
+  inline BitProperty* Bit::getProperty () const { return (BitProperty*)((ptrdiff_t)(this) - _offset); }
+  inline const Net*   Bit::getNet      () const { return (const Net*)getProperty()->getOwner(); }
+  inline void         Bit::destroy     () { ((Net*)getProperty()->getOwner())->remove( getProperty() ); }
+
+
+}  // Spice Namespace.
+
+
+INSPECTOR_P_SUPPORT(Spice::Bit);
diff --git a/crlcore/src/ccore/crlcore/SpiceEntity.h b/crlcore/src/ccore/crlcore/SpiceEntity.h
new file mode 100644
index 00000000..b2442cbb
--- /dev/null
+++ b/crlcore/src/ccore/crlcore/SpiceEntity.h
@@ -0,0 +1,129 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |         S P I C E  / Hurricane  Interface                       |
+// |                                                                 |
+// |  Author      :                    Jean-Paul Chaput              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Header  :   "./crlcore/SpiceEntity.h"                      |
+// +-----------------------------------------------------------------+
+
+
+#pragma  once
+#include <string>
+#include "hurricane/Name.h"
+#include "hurricane/Property.h"
+#include "hurricane/Slot.h"
+namespace Hurricane {
+  class Net;
+  class Instance;
+}
+#include "crlcore/ToolBox.h"
+#include "crlcore/SpiceBit.h"
+
+
+namespace Spice {
+
+  using std::ostream;
+  using Hurricane::Record;
+  using Hurricane::Name;
+  using Hurricane::DBo;
+  using Hurricane::Net;
+  using Hurricane::Cell;
+  using Hurricane::Instance;
+  using Hurricane::Plug;
+  using Hurricane::PrivateProperty;
+  using CRL::NamingScheme;
+
+  class Bit;
+  class EntityProperty;
+
+
+// -------------------------------------------------------------------
+// Class  :  "Spice::Entity".
+
+
+  class Entity {
+    public:
+      static std::vector<Entity*>&
+                              getAllEntities  ();
+      static void             orderPlugs      ( Instance*, std::vector<Plug*>& );
+    public:           
+                              Entity          ( EntityProperty*, Cell* );
+                             ~Entity          ();
+             const Cell*      getCell         () const;
+     inline  const BitVector& getBits         () const;
+             void             toNodeList      ( ostream&, bool asInterf=true ) const;
+             void             toEntity        ( ostream& ) const;
+             std::string      _getString      () const;
+             Record*          _getRecord      () const;
+    private:
+      static std::vector<Entity*>  _entities;
+      static std::ptrdiff_t        _offset;
+             BitVector             _bits;
+             size_t                _powerNode;
+             size_t                _groundNode;
+  };
+
+
+  inline  const BitVector& Entity::getBits () const { return _bits; }
+
+
+// -------------------------------------------------------------------
+// Class  :  "Spice::EntityProperty".
+
+  class EntityProperty : public Hurricane::PrivateProperty {
+      friend class EntityExtension;
+    public:
+      static  Name  _name;
+    public:
+      static  EntityProperty* create          ( Cell* owner );
+      static  Name            getPropertyName ();
+      virtual Name            getName         () const;
+      inline  Entity*         getEntity       ();
+      virtual void            onReleasedBy    ( DBo* owner );
+      virtual std::string     _getTypeName    () const;
+      virtual std::string     _getString      () const;
+      virtual Record*         _getRecord      () const;
+    protected:
+    // Attributes.
+      Entity  _entity;
+      
+    protected:
+    // Constructor.
+      inline  EntityProperty ( Cell* owner );
+  };
+
+
+  inline  EntityProperty::EntityProperty ( Cell* owner )
+    : PrivateProperty(), _entity(this,owner)
+  { }
+
+
+  inline Entity* EntityProperty::getEntity () { return &_entity; }
+
+
+// -------------------------------------------------------------------
+// Class  :  "Spice::EntityExtension".
+
+  class EntityExtension {
+    public:
+      static        void             destroyAll  ();
+      static        Entity*          get         ( const Cell* );
+      static        Entity*          create      ( Cell* );
+      static        void             destroy     ( Cell* );
+    private:
+      static const Cell*         _owner;
+      static Entity*             _cache;
+  };
+
+
+}  // Spice Namespace.
+
+
+INSPECTOR_P_SUPPORT(Spice::Entity);
diff --git a/crlcore/src/ccore/spice/SpiceBit.cpp b/crlcore/src/ccore/spice/SpiceBit.cpp
new file mode 100644
index 00000000..128198dd
--- /dev/null
+++ b/crlcore/src/ccore/spice/SpiceBit.cpp
@@ -0,0 +1,173 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |         S P I C E  / Hurricane  Interface                       |
+// |                                                                 |
+// |  Author      :                    Jean-Paul Chaput              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :   "./alliance/spice/SpiceBit.cpp"                |
+// +-----------------------------------------------------------------+
+
+
+#include "crlcore/SpiceBit.h"
+
+
+namespace Spice {
+
+  using namespace std;
+  using Hurricane::_TName;
+  using Hurricane::Property;
+
+
+  const size_t  Bit::nindex = std::numeric_limits<size_t>::max();
+
+
+// -------------------------------------------------------------------
+// Class  :  "::Bit" (implementation).
+
+  ptrdiff_t  Bit::_offset = 0;
+
+
+  Bit::Bit ( BitProperty* property, const Net* net, size_t index, string name )
+    : _index(index)
+    , _name (name)
+  {
+    if (not _offset) {
+    //_offset = offsetof(ScalarSignal,_toNet);
+      _offset = (ptrdiff_t)this - (ptrdiff_t)property;
+    }
+    if (_name.empty())
+      _name = to_string(_index);
+
+    // if (net->isPower ()) _name = getString(net->getName());
+    // if (net->isGround()) _name = getString(net->getName());
+  }
+
+
+  Bit::Bit ( size_t index, string name )
+    : _index(index)
+    , _name (name)
+  { }
+
+
+  Bit::~Bit ()
+  { }
+
+
+  bool          Bit::isExternal () const { return getNet()->isExternal(); }
+  size_t        Bit::getIndex   () const { return _index; }
+
+
+  string  Bit::_getString () const
+  {
+    string s = "<" + getString(getNet()->getName());
+    s += " order:";
+    if (_index != nindex) s += getString(_index);
+    else                  s += "nindex";
+    s += " node:\"" + _name + "\"";
+    s += ">";
+    return s;
+  }
+
+
+  Record* Bit::_getRecord () const
+  {
+    Record* record = new Record ( "<Bit " + _getString() + " >" );
+    if (record != NULL) {
+      record->add( getSlot("_index" , _index ) );
+    }
+    return record;
+  }
+
+
+// -------------------------------------------------------------------
+// Class  :  "BitProperty"
+
+  Name  BitProperty::_name = "Spice::Bit";
+
+
+  BitProperty* BitProperty::create ( Net* owner, size_t index )
+  {
+    BitProperty *property = new BitProperty( owner, index );
+
+    property->_postCreate ();
+    return property;
+  }
+
+
+  void  BitProperty::onReleasedBy ( DBo* owner )
+  { PrivateProperty::onReleasedBy( owner ); }
+
+
+  Name  BitProperty::getPropertyName ()
+  { return _name; }
+
+
+  Name  BitProperty::getName () const
+  { return getPropertyName(); }
+
+
+  string  BitProperty::_getTypeName () const
+  { return "Spice::BitProperty"; }
+
+
+  string  BitProperty::_getString () const
+  {
+    string s = PrivateProperty::_getString ();
+    s.insert ( s.length() - 1 , " " + getString(&_bit) );
+
+    return s;
+  }
+
+
+  Record* BitProperty::_getRecord () const
+  {
+    Record* record = PrivateProperty::_getRecord();
+    if ( record ) {
+      record->add( getSlot( "_name",  _name ) );
+      record->add( getSlot( "_bit" , &_bit  ) );
+    }
+    return record;
+  }
+
+
+// -------------------------------------------------------------------
+// Class  :  "BitExtension"
+
+
+  const Net* BitExtension::_owner = NULL;
+  Bit*       BitExtension::_cache = NULL;
+
+
+  Bit* BitExtension::get ( const Net* net )
+  {
+    if (net == _owner) return _cache;
+    _owner = net;
+
+    Property* property = _owner->getProperty( BitProperty::getPropertyName() );
+    if (property) _cache = static_cast<BitProperty*>(property)->getBit();
+    else          _cache = NULL;
+
+    return _cache;
+  }
+
+
+  Bit* BitExtension::create ( Net* net, size_t index )
+  {
+    get( net );
+    if (_cache) return _cache;
+
+    BitProperty* property = new BitProperty( net, index );
+    net->put( property );
+
+    _cache = property->getBit();
+    return _cache;
+  }
+
+
+} // Spice namespace.
diff --git a/crlcore/src/ccore/spice/SpiceDriver.cpp b/crlcore/src/ccore/spice/SpiceDriver.cpp
new file mode 100644
index 00000000..38a42527
--- /dev/null
+++ b/crlcore/src/ccore/spice/SpiceDriver.cpp
@@ -0,0 +1,84 @@
+
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |           S P I C E  / Hurricane  Interface                     |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :   "./spice/SpiceDriver.cpp"                      |
+// +-----------------------------------------------------------------+
+
+
+#include <ctime>
+#include <cmath>
+#include <cstdio>
+#include <cfenv>
+#include <string>
+#include <sstream>
+#include <fstream>
+#include <algorithm>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+using namespace std;
+
+#include "vlsisapd/configuration/Configuration.h"
+#include "hurricane/Warning.h"
+#include "hurricane/DataBase.h"
+#include "hurricane/BasicLayer.h"
+#include "hurricane/Technology.h"
+#include "hurricane/Horizontal.h"
+#include "hurricane/Vertical.h"
+#include "hurricane/Diagonal.h"
+#include "hurricane/Rectilinear.h"
+#include "hurricane/Polygon.h"
+#include "hurricane/Pad.h"
+#include "hurricane/Net.h"
+#include "hurricane/NetExternalComponents.h"
+#include "hurricane/Cell.h"
+#include "hurricane/Plug.h"
+#include "hurricane/Instance.h"
+using namespace Hurricane;
+
+#include "crlcore/Utilities.h"
+#include "crlcore/NetExtension.h"
+#include "crlcore/ToolBox.h"
+#include "crlcore/Spice.h"
+#include "crlcore/SpiceBit.h"
+#include "crlcore/SpiceEntity.h"
+using namespace CRL;
+
+
+
+namespace CRL {
+
+
+// -------------------------------------------------------------------
+// Class  :  "CRL::Spice".
+
+  bool  Spice::save ( Cell* cell )
+  {
+    ::Spice::Entity* spiceEntity = ::Spice::EntityExtension::create( cell );
+
+    string cellFile = getString(cell->getName()) + ".spi";
+    ofstream cellStream ( cellFile );
+    spiceEntity->toEntity( cellStream );
+    cellStream.close();
+
+    return true;
+  }
+
+
+  void  Spice::clearProperties ()
+  {
+    ::Spice::EntityExtension::destroyAll();
+  }
+
+
+}  // CRL namespace.
diff --git a/crlcore/src/ccore/spice/SpiceEntity.cpp b/crlcore/src/ccore/spice/SpiceEntity.cpp
new file mode 100644
index 00000000..4e5f8ac2
--- /dev/null
+++ b/crlcore/src/ccore/spice/SpiceEntity.cpp
@@ -0,0 +1,311 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |         S P I C E  / Hurricane  Interface                       |
+// |                                                                 |
+// |  Author      :                    Jean-Paul Chaput              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :   "./SpiceEntity.cpp"                            |
+// +-----------------------------------------------------------------+
+
+
+#include <iomanip>
+#include <ctime>
+#include "hurricane/Warning.h"
+#include "hurricane/Cell.h"
+#include "crlcore/SpiceEntity.h"
+
+
+namespace {
+
+  using Hurricane::Net;
+  using Hurricane::Instance;
+  using Spice::Bit;
+  using Spice::Entity;
+
+  
+}
+
+
+namespace Spice {
+
+  using namespace std;
+  using Hurricane::Warning;
+  using Hurricane::Property;
+  using Hurricane::_TName;
+  using Hurricane::Plug;
+
+
+  class ComparePlugBySpiceIndex {
+    public:
+      inline bool operator() ( const Plug* lhs, const Plug* rhs ) const
+      { return BitExtension::getIndex( lhs->getMasterNet() )
+             < BitExtension::getIndex( rhs->getMasterNet() ); }
+  };
+
+
+// -------------------------------------------------------------------
+// Class  :  "::Entity".
+
+  vector<Entity*>  Entity::_entities;
+  ptrdiff_t        Entity::_offset = 0;
+
+
+  Entity::Entity ( EntityProperty* property, Cell* cell )
+    : _bits()
+    , _powerNode (Bit::nindex)
+    , _groundNode(Bit::nindex)
+  {
+    if (not _offset) {
+    //_offset = offsetof(EntityProperty,_entity);
+      _offset = (ptrdiff_t)this - (ptrdiff_t)property;
+    }
+
+    map< string, Net*, greater<string> >  orderedNets;
+    for ( Net* net : cell->getNets() ) {
+      orderedNets.insert( make_pair( getString(net->getName()), net ) );
+    }
+    for ( auto item : orderedNets ) {
+      Bit* bit = BitExtension::create( item.second, _bits.size() );
+      _bits.push_back( bit );
+      if (item.second->isPower ()) _powerNode  = bit->getIndex();
+      if (item.second->isGround()) _groundNode = bit->getIndex();
+    }
+
+    _entities.push_back( this );
+  }
+
+
+  Entity::~Entity ()
+  {
+    for ( auto bit : _bits ) bit->destroy();
+    for ( auto ientity=_entities.begin() ; ientity!=_entities.end() ; ++ientity ) {
+      if (*ientity == this) {
+        _entities.erase( ientity );
+        break;
+      }
+    }
+  }
+
+
+  vector<Entity*>& Entity::getAllEntities ()
+  { return _entities; }
+
+
+  void  Entity::orderPlugs ( Instance* instance, vector<Plug*>& ordereds )
+  {
+    ordereds.clear();
+  //Entity* entity = EntityExtension::create( instance->getMasterCell() );
+    for ( Plug* plug : instance->getPlugs() )
+      ordereds.push_back( plug );
+    sort( ordereds.begin(), ordereds.end(), ComparePlugBySpiceIndex() );
+  }
+
+
+  const Cell* Entity::getCell () const
+  {
+    EntityProperty* property = (EntityProperty*)((ptrdiff_t)(this) - _offset);
+    return (const Cell*)property->getOwner();
+  }
+
+
+  void  Entity::toNodeList ( ostream& out, bool asInterf ) const
+  {
+    for ( Bit* bit : _bits ) {
+      const Net* net = bit->getNet();
+      if (not net->isExternal() and asInterf) continue;
+      out << "* " << ((asInterf) ? "INTERF" : "NET")
+          << setw(6) << BitExtension::getName(net)
+          << "  " << net->getName() << ".\n";
+    }
+    out << "\n";
+  }
+
+
+  void Entity::toEntity ( ostream& out ) const
+  {
+    set<Cell*,DBo::CompareById>  processedsModels;
+    string  cellName = getString( getCell()->getName() );
+    time_t  clock    = time( nullptr );
+    tm      tm       = *localtime( &clock );
+    char    stamp[1024];
+    strftime( stamp, 1024, "%b %d, %Y, %H:%M", &tm );
+
+    out << "* Coriolis Structural SPICE Driver\n";
+    out << "* Generated on " << stamp << "\n";
+    out << "* Cell/Subckt \"" << cellName << "\".\n";
+    out << "* \n";
+    toNodeList( out, true );
+
+    for ( Instance* instance : getCell()->getInstances() ) {
+      Cell* model = instance->getMasterCell();
+      if (processedsModels.find(model) != processedsModels.end())
+         continue;
+      out << ".include " << model->getName() << ".spi\n";
+      processedsModels.insert( model );
+    }
+    out << "\n";
+
+    out << ".subckt " << getCell()->getName();
+    for ( Bit* bit : _bits ) {
+      if (not bit->getNet()->isExternal()) continue;
+      out << " " << bit->getName();
+    }
+    out << "\n";
+    toNodeList( out, false );
+
+    for ( Instance* instance : getCell()->getInstances() ) {
+      Entity* masterEntity = EntityExtension::create( instance->getMasterCell() );
+      out << "x" << instance->getName();
+      vector<Plug*> sortedPlugs;
+      masterEntity->orderPlugs( instance, sortedPlugs );
+      for ( Plug* plug : sortedPlugs ) {
+        Net* plugNet = plug->getNet();
+        if (plugNet) {
+          out << " " << BitExtension::getName(plugNet);
+        } else {
+          if (plug->getMasterNet()->isPower()) {
+            out << " " << _powerNode;
+          } else {
+            if (plug->getMasterNet()->isGround()) {
+              out << " " << _groundNode;
+            } else
+              out << " ?";
+          }
+        }
+      }
+      out << " " << instance->getMasterCell()->getName() << "\n";
+    }
+    out << ".ends " << getCell()->getName() << "\n";
+  }
+
+
+  string  Entity::_getString () const
+  {
+    string  s = getString(getCell()->getName());
+    return s;
+  }
+
+
+  Record* Entity::_getRecord () const
+  {
+    Record* record = new Record ( "<Entity " + _getString() + " >" );
+    if (record != NULL) {
+      record->add( getSlot("_bits"      , _bits       ) );
+      record->add( getSlot("_powerNode" , _powerNode  ) );
+      record->add( getSlot("_groundNode", _groundNode ) );
+    }
+    return record;
+  }
+
+
+// -------------------------------------------------------------------
+// Class  :  "EntityProperty"
+
+  Name  EntityProperty::_name = "Spice::Entity";
+
+
+  EntityProperty* EntityProperty::create ( Cell* owner )
+  {
+    EntityProperty *property = new EntityProperty( owner );
+
+    property->_postCreate ();
+    return property;
+  }
+
+
+  void  EntityProperty::onReleasedBy ( DBo* owner )
+  { PrivateProperty::onReleasedBy( owner ); }
+
+
+  Name  EntityProperty::getPropertyName ()
+  { return _name; }
+
+
+  Name  EntityProperty::getName () const
+  { return getPropertyName(); }
+
+
+  string  EntityProperty::_getTypeName () const
+  { return _TName( "EntityProperty" ); }
+
+
+  string  EntityProperty::_getString () const
+  {
+    string s = PrivateProperty::_getString ();
+    s.insert ( s.length() - 1 , " " + getString(&_entity) );
+
+    return s;
+  }
+
+
+  Record* EntityProperty::_getRecord () const
+  {
+    Record* record = PrivateProperty::_getRecord();
+    if ( record ) {
+      record->add( getSlot( "_name"  ,  _name   ) );
+      record->add( getSlot( "_entity", &_entity ) );
+    }
+    return record;
+  }
+
+
+// -------------------------------------------------------------------
+// Class  :  "EntityExtension"
+
+
+  const Cell*    EntityExtension::_owner = NULL;
+  Entity*        EntityExtension::_cache = NULL;
+
+
+  Entity* EntityExtension::get ( const Cell* cell )
+  {
+    if (cell != _owner) {
+      _owner = cell;
+
+      Property* property = _owner->getProperty( EntityProperty::getPropertyName() );
+      if (property) _cache = static_cast<EntityProperty*>(property)->getEntity();
+      else          _cache = NULL;
+    }
+    return _cache;
+  }
+
+
+  Entity* EntityExtension::create ( Cell* cell )
+  {
+    get( cell );
+    if (not _cache) {
+      EntityProperty* property = new EntityProperty( cell );
+      cell->put( property );
+
+      _cache = property->getEntity();
+    }
+    return _cache;
+  }
+
+
+  void  EntityExtension::destroy ( Cell* cell )
+  {
+    Property* property = cell->getProperty( EntityProperty::getPropertyName() );
+    if (property) cell->remove( property );
+
+    _owner = NULL;
+    _cache = NULL;
+  }
+
+
+  void  EntityExtension::destroyAll ()
+  {
+    vector<Entity*>& entities = Entity::getAllEntities();
+
+    while ( not entities.empty() ) destroy( const_cast<Cell*>(entities.back()->getCell()) );
+  }
+
+
+
+}  // Spice namespace.
diff --git a/crlcore/src/ccore/spice/SpiceParser.cpp b/crlcore/src/ccore/spice/SpiceParser.cpp
new file mode 100644
index 00000000..e82b8116
--- /dev/null
+++ b/crlcore/src/ccore/spice/SpiceParser.cpp
@@ -0,0 +1,80 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |           S P I C E  / Hurricane  Interface                     |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :   "./spice/SpiceParser.cpp"                      |
+// +-----------------------------------------------------------------+
+
+
+#include <ctime>
+#include <cstdio>
+#include <string>
+#include <bitset>
+#include <sstream>
+#include <fstream>
+#include <algorithm>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+using namespace std;
+
+#include "vlsisapd/configuration/Configuration.h"
+#include "hurricane/DebugSession.h"
+#include "hurricane/UpdateSession.h"
+#include "hurricane/Warning.h"
+#include "hurricane/DataBase.h"
+#include "hurricane/Technology.h"
+#include "hurricane/BasicLayer.h"
+#include "hurricane/Horizontal.h"
+#include "hurricane/Vertical.h"
+#include "hurricane/Diagonal.h"
+#include "hurricane/Rectilinear.h"
+#include "hurricane/Pad.h"
+#include "hurricane/Net.h"
+#include "hurricane/Cell.h"
+#include "hurricane/Library.h"
+#include "hurricane/Plug.h"
+#include "hurricane/Instance.h"
+#include "hurricane/NetExternalComponents.h"
+#include "hurricane/UpdateSession.h"
+using namespace Hurricane;
+
+#include "crlcore/Utilities.h"
+#include "crlcore/NetExtension.h"
+#include "crlcore/ToolBox.h"
+#include "crlcore/Spice.h"
+using namespace CRL;
+
+
+namespace CRL {
+
+
+// -------------------------------------------------------------------
+// Class  :  "CRL::Spice".
+
+  bool  Spice::load ( Library* library, string spicePath )
+  {
+  //DebugSession::open( 101, 110 );
+    UpdateSession::open();
+
+    cerr << Error( "Spice::load(): SPICE parser is not implemented yet.\n"
+                 "        \"%s\"."
+                 , spicePath.c_str()
+                 ) << endl;
+
+    UpdateSession::close();
+  //DebugSession::close();
+
+    return false;
+  }
+
+
+}  // CRL namespace.
diff --git a/crlcore/src/pyCRL/CMakeLists.txt b/crlcore/src/pyCRL/CMakeLists.txt
index d7319e74..a19f6adc 100644
--- a/crlcore/src/pyCRL/CMakeLists.txt
+++ b/crlcore/src/pyCRL/CMakeLists.txt
@@ -44,6 +44,7 @@
                                     PyGraphicToolEngine.cpp
                                     PyAcmSigda.cpp
                                     PyIspd05.cpp
+                                    PySpice.cpp
                                     PyBlif.cpp
                                     PyGds.cpp
                                     PyLefImport.cpp
@@ -65,6 +66,7 @@
                                     crlcore/PyGraphicToolEngine.h
                                     crlcore/PyAcmSigda.h
                                     crlcore/PyIspd05.h
+                                    crlcore/PySpice.h
                                     crlcore/PyBlif.h
                                     crlcore/PyGds.h
                                     crlcore/PyLefImport.h
diff --git a/crlcore/src/pyCRL/PyCRL.cpp b/crlcore/src/pyCRL/PyCRL.cpp
index 084669aa..5752a1db 100644
--- a/crlcore/src/pyCRL/PyCRL.cpp
+++ b/crlcore/src/pyCRL/PyCRL.cpp
@@ -1,7 +1,7 @@
 // -*- C++ -*-
 //
 // This file is part of the Coriolis Software.
-// Copyright (c) UPMC 2010-2018, All Rights Reserved
+// Copyright (c) SU 2010-2021, All Rights Reserved
 //
 // +-----------------------------------------------------------------+ 
 // |                   C O R I O L I S                               |
@@ -32,6 +32,7 @@
 #include "crlcore/PyToolEngineCollection.h"
 #include "crlcore/PyAcmSigda.h"
 #include "crlcore/PyIspd05.h"
+#include "crlcore/PySpice.h"
 #include "crlcore/PyBlif.h"
 #include "crlcore/PyGds.h"
 #include "crlcore/PyLefImport.h"
@@ -125,6 +126,7 @@ extern "C" {
     PyToolEngineCollection_LinkPyType ();
     PyAcmSigda_LinkPyType ();
     PyIspd05_LinkPyType ();
+    PySpice_LinkPyType ();
     PyBlif_LinkPyType ();
     PyGds_LinkPyType ();
     PyLefImport_LinkPyType ();
@@ -147,6 +149,7 @@ extern "C" {
     PYTYPE_READY ( ToolEngineCollectionLocator );
     PYTYPE_READY ( AcmSigda );
     PYTYPE_READY ( Ispd05 );
+    PYTYPE_READY ( Spice );
     PYTYPE_READY ( Blif );
     PYTYPE_READY ( Gds );
     PYTYPE_READY ( LefImport );
@@ -201,6 +204,8 @@ extern "C" {
     PyModule_AddObject ( module, "AcmSigda", (PyObject*)&PyTypeAcmSigda );
     Py_INCREF ( &PyTypeIspd05 );
     PyModule_AddObject ( module, "Ispd05", (PyObject*)&PyTypeIspd05 );
+    Py_INCREF ( &PyTypeSpice );
+    PyModule_AddObject ( module, "Spice", (PyObject*)&PyTypeSpice );
     Py_INCREF ( &PyTypeBlif );
     PyModule_AddObject ( module, "Blif", (PyObject*)&PyTypeBlif );
     Py_INCREF ( &PyTypeGds );
diff --git a/crlcore/src/pyCRL/PySpice.cpp b/crlcore/src/pyCRL/PySpice.cpp
new file mode 100644
index 00000000..7528ed8b
--- /dev/null
+++ b/crlcore/src/pyCRL/PySpice.cpp
@@ -0,0 +1,154 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |          Alliance / Hurricane  Interface                        |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :  "./PySpice.cpp"                                 |
+// +-----------------------------------------------------------------+
+
+
+#include "crlcore/PySpice.h"
+#include "hurricane/isobar/PyCell.h"
+#include "hurricane/isobar/PyLibrary.h"
+#include <string>
+#include <sstream>
+
+
+namespace  CRL {
+
+  using std::cerr;
+  using std::endl;
+  using std::hex;
+  using std::string;
+  using std::ostringstream;
+  using Hurricane::tab;
+  using Hurricane::Exception;
+  using Hurricane::Bug;
+  using Hurricane::Error;
+  using Hurricane::Warning;
+  using Isobar::ProxyProperty;
+  using Isobar::ProxyError;
+  using Isobar::ConstructorError;
+  using Isobar::HurricaneError;
+  using Isobar::HurricaneWarning;
+  using Isobar::getPyHash;
+  using Isobar::ParseOneArg;
+  using Isobar::ParseTwoArg;
+  using Isobar::__cs;
+  using Isobar::PyCell;
+  using Isobar::PyTypeCell;
+  using Isobar::PyCell_Link;
+  using Isobar::PyLibrary;
+  using Isobar::PyTypeLibrary;
+  using Isobar::PyLibrary_Link;
+
+
+extern "C" {
+
+
+#if defined(__PYTHON_MODULE__)
+
+// +=================================================================+
+// |               "PySpice" Python Module Code Part                 |
+// +=================================================================+
+
+
+  static PyObject* PySpice_save ( PyObject*, PyObject* args )
+  {
+    cdebug_log(30,0) << "PySpice_save()" << endl;
+
+    HTRY
+      PyObject* pyCell = NULL;
+      if (PyArg_ParseTuple( args, "O:Spice.save", &pyCell )) {
+        if (IsPyCell(pyCell)) {
+          Spice::save( PYCELL_O(pyCell) );
+        } else {
+          PyErr_SetString( ConstructorError, "Spice.save(): Bad parameter type (not a Cell)." );
+          return NULL;
+        }
+      } else {
+        PyErr_SetString( ConstructorError, "Spice.save(): Bad number of parameters." );
+        return NULL;
+      }
+    HCATCH
+
+    Py_RETURN_NONE;
+  }
+
+
+  static PyObject* PySpice_load ( PyObject*, PyObject* args )
+  {
+    cdebug_log(30,0) << "PySpice_load()" << endl;
+
+    char* path = NULL;
+    
+    HTRY
+      PyObject* pyLibrary = NULL;
+      if (PyArg_ParseTuple( args, "Os:Spice.load", &pyLibrary, &path )) {
+        if (IsPyLibrary(pyLibrary)) {
+          Spice::load( PYLIBRARY_O(pyLibrary), string(path) );
+        } else {
+          PyErr_SetString( ConstructorError, "Spice.load(): Bad parameter type (not a Library)." );
+          return NULL;
+        }
+      } else {
+        PyErr_SetString( ConstructorError, "Spice.load(): Bad number of parameters." );
+        return NULL;
+      }
+    HCATCH
+
+    Py_RETURN_NONE;
+  }
+
+
+  static PyObject* PySpice_clearProperties ( PyObject* )
+  {
+    cdebug_log(30,0) << "PySpice_clearProperties()" << endl;
+    HTRY
+      Spice::clearProperties();
+    HCATCH
+    Py_RETURN_NONE;
+  }
+
+
+  // Standart Destroy (Attribute).
+
+
+  PyMethodDef PySpice_Methods[] =
+    { { "save"                , (PyCFunction)PySpice_save     , METH_VARARGS|METH_STATIC
+                              , "Save a complete Spice design." }
+    , { "load"                , (PyCFunction)PySpice_load     , METH_VARARGS|METH_STATIC
+                              , "Load a Spice layout inside a Cell (cumulative)." }
+    , { "clearProperties"     , (PyCFunction)PySpice_clearProperties, METH_NOARGS|METH_STATIC
+                              , "Remove all SPICE related properties from the Cells." }
+    , {NULL, NULL, 0, NULL}   /* sentinel */
+    };
+
+
+  NoObjectDeleteMethod(Spice)
+  PyTypeObjectLinkPyTypeWithoutObject(Spice,Spice)
+
+
+#else  // End of Python Module Code Part.
+
+
+// +=================================================================+
+// |                "PySpice" Shared Library Code Part               |
+// +=================================================================+
+
+  // Type Definition.
+  PyTypeObjectDefinitionsOfModule(CRL,Spice)
+
+
+#endif  // End of Shared Library Code Part.
+
+}  // extern "C".
+
+}  // CRL namespace.
diff --git a/crlcore/src/pyCRL/crlcore/PySpice.h b/crlcore/src/pyCRL/crlcore/PySpice.h
new file mode 100644
index 00000000..24e2856d
--- /dev/null
+++ b/crlcore/src/pyCRL/crlcore/PySpice.h
@@ -0,0 +1,51 @@
+
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) SU 2021-2021, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |          Alliance / Hurricane  Interface                        |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :       Jean-Paul.Chaput@asim.lip6.fr              |
+// | =============================================================== |
+// |  C++ Header  :  "./crlcore/PySpice.h"                           |
+// +-----------------------------------------------------------------+
+
+
+#pragma  once
+#include "hurricane/isobar/PyHurricane.h"
+#include "crlcore/Spice.h"
+
+
+namespace  CRL {
+
+extern "C" {
+
+
+// -------------------------------------------------------------------
+// Python Object  :  "PySpice".
+
+  typedef struct {
+      PyObject_HEAD
+  } PySpice;
+
+
+// -------------------------------------------------------------------
+// Functions & Types exported to "PyCRL.ccp".
+
+  extern  PyTypeObject  PyTypeSpice;
+  extern  PyMethodDef   PySpice_Methods[];
+
+  extern  void          PySpice_LinkPyType();
+
+
+#define IsPySpice(v)    ( (v)->ob_type == &PyTypeSpice )
+#define PY_SPICE(v)     ( (PySpice*)(v) )
+
+
+}  // extern "C".
+
+}  // Hurricane namespace.
diff --git a/cumulus/src/plugins/alpha/block/configuration.py b/cumulus/src/plugins/alpha/block/configuration.py
index a7604cf5..ee52136e 100644
--- a/cumulus/src/plugins/alpha/block/configuration.py
+++ b/cumulus/src/plugins/alpha/block/configuration.py
@@ -1236,11 +1236,12 @@ class BlockConf ( GaugeConf ):
             topCell = self.chip
             self.corona.setName( self.corona.getName()+'_r' )
             self.chip  .setName( self.chip  .getName()+'_r' )
-            rsave( self.corona, views|flags )
-            rsave( self.chip  , views|flags )
+            rsave( self.corona, views|flags, enableSpice=True )
+            rsave( self.chip  , views|flags, enableSpice=True )
         if not self.routingGauge.isSymbolic():
             print( '     + {} (GDSII).'.format( topCell.getName() ))
             CRL.Gds.save( topCell )
+        CRL.Spice.clearProperties()
         return
         
     def toXPitch ( self, x, superior=False ):
diff --git a/cumulus/src/plugins/rsave.py b/cumulus/src/plugins/rsave.py
index c69fdcdb..0df225fa 100644
--- a/cumulus/src/plugins/rsave.py
+++ b/cumulus/src/plugins/rsave.py
@@ -31,7 +31,7 @@ except Exception, e:
     sys.exit(2)
 
 
-def rsave ( cell, views=CRL.Catalog.State.Physical, depth=0 ):
+def rsave ( cell, views=CRL.Catalog.State.Physical, depth=0, enableSpice=False ):
     """
     Write back layout to disk if everything has gone fine.
     Must write all the sub-blocks of the core but *not* the
@@ -47,15 +47,20 @@ def rsave ( cell, views=CRL.Catalog.State.Physical, depth=0 ):
     if views & CRL.Catalog.State.Logical:
         sviews += 'netlist'
         if views & CRL.Catalog.State.VstUseConcat:
-            if sviews: sviews += ','
-            sviews += ' uses &'
+            if sviews: sviews += ', '
+            sviews += 'uses &'
         if views & CRL.Catalog.State.VstNoLowerCase:
-            if sviews: sviews += ', no lowercase'
+            if sviews: sviews += ', '
+            sviews += 'no lowercase'
         if views & CRL.Catalog.State.VstUniquifyUpperCase:
-            if sviews: sviews += ', uniquify uppercase'
+            if sviews: sviews += ', '
+            sviews += 'uniquify uppercase'
         if views & CRL.Catalog.State.VstNoLinkage:
-            if sviews: sviews += ', no linkage'
-            sviews += ''
+            if sviews: sviews += ', '
+            sviews += 'no linkage'
+        if enableSpice:
+            if sviews: sviews += ', '
+            sviews += 'SPICE'
     if views & CRL.Catalog.State.Physical:
         if sviews: sviews += ','
         sviews += 'layout'
@@ -64,11 +69,12 @@ def rsave ( cell, views=CRL.Catalog.State.Physical, depth=0 ):
     if cell.getName().endswith('_cts'): views |= CRL.Catalog.State.Logical
     if cell.getName().endswith('_r'  ): views |= CRL.Catalog.State.Logical
     framework.saveCell( cell, views )
+    CRL.Spice.save( cell )
     for instance in cell.getInstances():
         #print( '     {}| {}.'.format(' '*(depth*2), instance) )
         masterCell = instance.getMasterCell()
         if not masterCell.isTerminalNetlist():
-            rsave( masterCell, views, depth+1 )
+            rsave( masterCell, views, depth+1, enableSpice )
         #else:
         #    print( '     {}| Master cell is terminal netlist {}.'.format(' '*(depth*2), instance.getMasterCell()) )
     return