diff --git a/hurricane/src/hurricane/Cell.cpp b/hurricane/src/hurricane/Cell.cpp
index 010ed09e..8e938eb7 100644
--- a/hurricane/src/hurricane/Cell.cpp
+++ b/hurricane/src/hurricane/Cell.cpp
@@ -617,12 +617,14 @@ void Cell::flattenNets(unsigned int flags)
 
     HyperNet  hyperNet ( occurrence );
     if ( not occurrence.getPath().isEmpty() ) {
-    //cerr << "* HyperNet: " << occurrence.getName() << endl;
       Net* duplicate = getNet( occurrence.getName() );
       if (not duplicate) {
         hyperNets.push_back( HyperNet(occurrence) );
       } else {
-        trace << "Found " << duplicate << " in " << duplicate->getCell() << endl;
+        cerr << Warning( "Cell::flattenNets(): Found duplicate: \"%s\" in \"%s\""
+                       , getString(duplicate).c_str()
+                       , getString(duplicate->getCell()->getName()).c_str()
+                       ) << endl;
       }
       continue;
     }
diff --git a/hurricane/src/hurricane/CellCollections.cpp b/hurricane/src/hurricane/CellCollections.cpp
index 83b09eba..904cff01 100644
--- a/hurricane/src/hurricane/CellCollections.cpp
+++ b/hurricane/src/hurricane/CellCollections.cpp
@@ -4704,7 +4704,7 @@ string Cell_HyperNetRootNetOccurrences::_getString() const
 // ****************************************************************************************************
 
 Cell_HyperNetRootNetOccurrences::Locator::Locator()
-// ***********************************
+// ************************************************
 :    Inherit(),
     _path(),
     _netLocator(),
@@ -4714,22 +4714,24 @@ Cell_HyperNetRootNetOccurrences::Locator::Locator()
 }
 
 Cell_HyperNetRootNetOccurrences::Locator::Locator(const Cell* cell, Path path)
-// **************************************************************
+// ***************************************************************************
 :    Inherit(),
     _path(path),
     _netLocator(),
     _instanceLocator(),
     _hyperNetRootNetOccurrenceLocator()
 {
-    _netLocator=cell->getNets().getLocator();
+    _netLocator      = cell->getNets().getLocator();
+    _instanceLocator = cell->getInstances().getLocator();
 
-    _instanceLocator=cell->getInstances().getLocator();
-
-    while (_netLocator.isValid() && !isHyperNetRootNetOccurrence(Occurrence(_netLocator.getElement(),_path)))
+    while ( _netLocator.isValid()
+          and (      dynamic_cast<DeepNet*>(_netLocator.getElement())
+              or     _netLocator.getElement()->isAutomatic()
+              or not isHyperNetRootNetOccurrence(Occurrence(_netLocator.getElement(),_path))) )
         _netLocator.progress();
 
-    if (!_netLocator.isValid())
-        while (!_hyperNetRootNetOccurrenceLocator.isValid() && _instanceLocator.isValid())
+    if (not _netLocator.isValid())
+        while (not _hyperNetRootNetOccurrenceLocator.isValid() and _instanceLocator.isValid())
         {
             Instance* instance = _instanceLocator.getElement();
             _hyperNetRootNetOccurrenceLocator=Locator(instance->getMasterCell(),Path(_path,instance));
@@ -4738,7 +4740,7 @@ Cell_HyperNetRootNetOccurrences::Locator::Locator(const Cell* cell, Path path)
 }
 
 Cell_HyperNetRootNetOccurrences::Locator::Locator(const Locator& locator)
-// *********************************************************
+// **********************************************************************
 :    Inherit(),
     _path(locator._path),
     _netLocator(locator._netLocator),
@@ -4748,7 +4750,7 @@ Cell_HyperNetRootNetOccurrences::Locator::Locator(const Locator& locator)
 }
 
 Cell_HyperNetRootNetOccurrences::Locator& Cell_HyperNetRootNetOccurrences::Locator::operator=(const Locator& locator)
-// ****************************************************************************************
+// ******************************************************************************************************************
 {
     _path = locator._path;
     _netLocator = locator._netLocator;
@@ -4758,7 +4760,7 @@ Cell_HyperNetRootNetOccurrences::Locator& Cell_HyperNetRootNetOccurrences::Locat
 }
 
 Occurrence Cell_HyperNetRootNetOccurrences::Locator::getElement() const
-// ******************************************************
+// ********************************************************************
 {
     if (_netLocator.isValid())
         return Occurrence(_netLocator.getElement(),_path);
@@ -4770,25 +4772,26 @@ Occurrence Cell_HyperNetRootNetOccurrences::Locator::getElement() const
 }
 
 Locator<Occurrence>* Cell_HyperNetRootNetOccurrences::Locator::getClone() const
-// **************************************************************
+// ****************************************************************************
 {
     return new Locator(*this);
 }
 
 bool Cell_HyperNetRootNetOccurrences::Locator::isValid() const
-// **********************************************
+// ***********************************************************
 {
     return (_netLocator.isValid() || (_hyperNetRootNetOccurrenceLocator.isValid()));
 }
 
 void Cell_HyperNetRootNetOccurrences::Locator::progress()
-// *****************************************
+// ******************************************************
 {
     if (_netLocator.isValid())
     {
       _netLocator.progress();
       while ( _netLocator.isValid() ) {
         if (   not dynamic_cast<DeepNet*>(_netLocator.getElement())
+           and not _netLocator.getElement()->isAutomatic()
            and isHyperNetRootNetOccurrence(Occurrence(_netLocator.getElement(),_path))) break;
 
         _netLocator.progress();
@@ -4808,7 +4811,7 @@ void Cell_HyperNetRootNetOccurrences::Locator::progress()
 }
 
 string Cell_HyperNetRootNetOccurrences::Locator::_getString() const
-// ***************************************************
+// ****************************************************************
 {
     string s = "<" + _TName("Cell::HyperNetRootNetOccurrences::Locator");
     if (!_path.isEmpty())
diff --git a/hurricane/src/hurricane/DeepNet.cpp b/hurricane/src/hurricane/DeepNet.cpp
index 301ab269..8bb83f46 100644
--- a/hurricane/src/hurricane/DeepNet.cpp
+++ b/hurricane/src/hurricane/DeepNet.cpp
@@ -29,6 +29,7 @@
 // +-----------------------------------------------------------------+
 
 
+#include "hurricane/Warning.h"
 #include "hurricane/DeepNet.h"
 #include "hurricane/Cell.h"
 #include "hurricane/Instance.h"
@@ -64,14 +65,20 @@ namespace Hurricane {
     if (not hyperNet.isValid())
       throw Error ( "Can't create " + _TName("DeepNet") + ": occurence is invalid." );
 
+    if (not isHyperNetRootNetOccurrence(hyperNet.getNetOccurrence())) {
+      cerr << Warning( "DeepNet::create(): Occurrence \"%s\" is not a root one."
+                     , hyperNet.getNetOccurrence().getCompactString().c_str()
+                     ) << endl;
+    }
+
     Occurrence  rootNetOccurrence = getHyperNetRootNetOccurrence( hyperNet.getNetOccurrence() );
 
     if (rootNetOccurrence.getMasterCell()->isFlattenLeaf()) return NULL;
     if (rootNetOccurrence.getPath().isEmpty())              return NULL;
-
+    
     DeepNet* deepNet = new DeepNet( rootNetOccurrence );
     deepNet->_postCreate();
-    
+
     return deepNet;
   }
 
@@ -84,7 +91,8 @@ namespace Hurricane {
     bool        createRp      = true;
 
     for ( Occurrence occurrence : hyperNet.getComponentOccurrences() ) {
-      if ( dynamic_cast<RoutingPad*>(occurrence.getEntity()) ) { createRp = false; break; }
+      RoutingPad* rp = dynamic_cast<RoutingPad*>(occurrence.getEntity());
+      if ( rp and (rp->getCell() == getCell()) ) { createRp = false; break; }
       if ( dynamic_cast<Segment*   >(occurrence.getEntity()) ) { createRp = false; break; }
     }
     if (not createRp) return 0;
@@ -97,9 +105,7 @@ namespace Hurricane {
         currentRp->isPlacedOccurrence ( RoutingPad::ShowWarning );
 
       if (nbRoutingPads == 1) {
-      //Net* net =
         currentRp->getNet();
-      //cerr << "_createRoutingPads on " << net->getName() << " buildRing:" << endl;
       }
     }
 
diff --git a/hurricane/src/hurricane/hurricane/HyperNet.h b/hurricane/src/hurricane/hurricane/HyperNet.h
index 0a3530d7..bb0352c3 100644
--- a/hurricane/src/hurricane/hurricane/HyperNet.h
+++ b/hurricane/src/hurricane/hurricane/HyperNet.h
@@ -84,6 +84,7 @@ bool isHyperNetRootNetOccurrence(Occurrence netoccurrence);
 
 
 INSPECTOR_P_SUPPORT(Hurricane::HyperNet);
+IOSTREAM_VALUE_SUPPORT(Hurricane::HyperNet);