diff --git a/hurricane/src/configuration/hurricane/configuration/PyCollection.h b/hurricane/src/configuration/hurricane/configuration/PyCollection.h
index 723413a0..a1a00027 100644
--- a/hurricane/src/configuration/hurricane/configuration/PyCollection.h
+++ b/hurricane/src/configuration/hurricane/configuration/PyCollection.h
@@ -211,8 +211,8 @@ namespace Isobar3 {
     PyTypeObject* ob_type = manager->_getTypeObject();
     ob_type->tp_iter      = (getiterfunc)&::Isobar3::_tpIter;
 
-    std::cerr << "Add to manager: <"
-              << ::Hurricane::demangle(typeid( Hurricane::Collection<CppT*> )) << ">" << std::endl;
+    //std::cerr << "Add to manager: <"
+    //          << ::Hurricane::demangle(typeid( Hurricane::Collection<CppT*> )) << ">" << std::endl;
     PyTypeManager::add< Hurricane::Collection<CppT*> >
       ( module, manager, typeid(Hurricane::Collection<CppT*>).hash_code() );
     PyTypeManagerLocator<CppT>::create( module, flags );
diff --git a/hurricane/src/configuration/hurricane/configuration/PyMap.h b/hurricane/src/configuration/hurricane/configuration/PyMap.h
index dad38f6e..5b5a7fff 100644
--- a/hurricane/src/configuration/hurricane/configuration/PyMap.h
+++ b/hurricane/src/configuration/hurricane/configuration/PyMap.h
@@ -117,7 +117,7 @@ namespace Isobar3 {
     string elementName = ::Hurricane::demangle(typeid(CppT));
     size_t cppScope    = elementName.find_last_of( "::" );
     if (cppScope != std::string::npos) elementName = elementName.substr( cppScope+1 );
-    cerr << "elementName: " << elementName <<endl;
+    //cerr << "elementName: " << elementName <<endl;
     string keyName = ::Hurricane::demangle(typeid(CppK));
     cppScope       = keyName.find_last_of( "::" );
     if (cppScope != std::string::npos) keyName = keyName.substr( cppScope+1 );
@@ -218,9 +218,9 @@ namespace Isobar3 {
   template< typename CppK, typename CppT >
   PyObject* PyTypeManagerMap<CppK,CppT>::_getMpSubscript ( PyObject* self, PyObject* pyKey )
   {
-    std::cerr << "PyTypeManagerMap<CppK,CppT>::_getMpSubscript" << endl;
-    std::cerr << "CppK: " << demangle(typeid(CppK)) << std::endl;
-    std::cerr << "CppT: " << demangle(typeid(CppT)) << std::endl;
+    //std::cerr << "PyTypeManagerMap<CppK,CppT>::_getMpSubscript" << endl;
+    //std::cerr << "CppK: " << demangle(typeid(CppK)) << std::endl;
+    //std::cerr << "CppT: " << demangle(typeid(CppT)) << std::endl;
     std::map<CppK,CppT>* pmap = NULL;
     if (not pyToC(self,&pmap)) {
       std::string message = "PyTypeManagerMap<CppK,CppT>::_getMpSubscript(): pyToC<> failed. \".";
@@ -228,7 +228,7 @@ namespace Isobar3 {
       return NULL;
     }
     CppK key;
-    std::cerr << "extracting key, type: " << demangle(typeid(CppK)) << std::endl;
+    //std::cerr << "extracting key, type: " << demangle(typeid(CppK)) << std::endl;
     if (not pyToC( pyKey, &key )) {
       std::string message = "PyTypeManagerMap<CppK,CppT>::_getMpSubscript(): Unable to convert key.";
       PyErr_SetString( HurricaneError, message.c_str() );
@@ -266,10 +266,9 @@ namespace Isobar3 {
   template< typename CppK, typename CppT >
   PyTypeManagerMap<CppK,CppT>* PyTypeManagerMap<CppK,CppT>::create ( PyObject* module, uint64_t flags )
   {
-    cerr << "PyTypeManagerMap<"
-          << ::Hurricane::demangle(typeid(std::map<CppK,CppT>)) << ">::create()" << endl;
-
-    cerr << "CppK: " << demangle(typeid(CppK)) << endl <<" CppT: " << demangle(typeid(CppT)) << endl;
+    // cerr << "PyTypeManagerMap<"
+    //       << ::Hurricane::demangle(typeid(std::map<CppK,CppT>)) << ">::create()" << endl;
+    // cerr << "CppK: " << demangle(typeid(CppK)) << endl <<" CppT: " << demangle(typeid(CppT)) << endl;
 
     PyTypeManagerMap<CppK,CppT>* manager = new PyTypeManagerMap<CppK,CppT>( flags );
 
diff --git a/hurricane/src/configuration/hurricane/configuration/PyTypeManager.h b/hurricane/src/configuration/hurricane/configuration/PyTypeManager.h
index c80e37b0..caab303b 100644
--- a/hurricane/src/configuration/hurricane/configuration/PyTypeManager.h
+++ b/hurricane/src/configuration/hurricane/configuration/PyTypeManager.h
@@ -435,12 +435,12 @@ extern "C" {
   template< typename CppT >
   inline PyObject* PyTypeManager::link ( CppT* object )
   {
-    std::cerr << "PyTypeManager<CppT>::link() " << demangle(typeid(CppT).name())
-               << "* object = " << (void*)object << ":" << object << std::endl;
+    // std::cerr << "PyTypeManager<CppT>::link() " << demangle(typeid(CppT).name())
+    //            << "* object = " << (void*)object << ":" << object << std::endl;
     if (not object) Py_RETURN_NONE;
     PyTypeManagerVTrunk<CppT>* manager = dynamic_cast< PyTypeManagerVTrunk<CppT>* >( _get<CppT>() );
-    std::cerr << "_get<CppT>()=" << _get<CppT>() << endl;
-     std::cerr << demangle(typeid(PyTypeManagerVTrunk<CppT>*).name()) << endl;
+    // std::cerr << "_get<CppT>()=" << _get<CppT>() << endl;
+    // std::cerr << demangle(typeid(PyTypeManagerVTrunk<CppT>*).name()) << endl;
     if (not manager)
       throw Error( "PyTypeManager<CppT>::link(): No manager for type <%s>."
                  , demangle(typeid(CppT).name()).c_str() );
@@ -1584,7 +1584,7 @@ template< typename T
         , typename std::enable_if< !std::is_pointer<T>::value, bool >::type = true >
 inline bool  pyToC ( PyObject* pyArg, T* arg )
 {
-  std::cerr << "template< typename T , typename std::enable_if< !std::is_pointer<T>::value, bool >::type = true > pyToC( PyObject* pyArg, T* arg ) " << " T = " << demangle(typeid(T).name()) <<std::endl;
+  // std::cerr << "template< typename T , typename std::enable_if< !std::is_pointer<T>::value, bool >::type = true > pyToC( PyObject* pyArg, T* arg ) " << " T = " << demangle(typeid(T).name()) <<std::endl;
   typedef typename std::remove_cv<T>::type  NonConstT;
   Isobar3::PyTypeManager* manager = Isobar3::PyTypeManager::_get<T>();
   if (not manager) {
@@ -1600,14 +1600,14 @@ inline bool  pyToC ( PyObject* pyArg, T* arg )
 template<typename T>
 inline bool  pyToC ( PyObject* pyArg, T** arg )
 {
-  std::cerr << "template<typename T> pyToC( PyObject* pyArg, T** arg ) " << " T = " << demangle(typeid(T).name()) <<std::endl;
+  // std::cerr << "template<typename T> pyToC( PyObject* pyArg, T** arg ) " << " T = " << demangle(typeid(T).name()) <<std::endl;
 
   Isobar3::PyTypeManager* manager = Isobar3::PyTypeManager::_get<T>();
   if (not manager) {
     std::cerr << "Isobar3::pyToC<T>(T*&): Unsupported type \"" << demangle(typeid(T).name()) << "\"" << std::endl;
     return false;
   }
-   std::cerr << "pyToC< " << demangle(typeid(T).name()) << " >() called." << std::endl;
+  // std::cerr << "pyToC< " << demangle(typeid(T).name()) << " >() called." << std::endl;
   *arg = (T*)( Isobar3::object1( pyArg ));
   std::cerr << "returning "<<std::endl;
   return true;
@@ -1707,12 +1707,12 @@ namespace Isobar3 {
     const std::string nth[] = { "First", "Second" , "Third", "Fourth", "Fifth"
                               , "Sixth", "Seventh", "Eight", "Ninth" , "Tenth" };
 
-  std::cerr << "Calling pyToC<" << demangle(typeid(typename Arg<T>::ValueT).name()) << ">" << std::endl;
-  std::cerr << "Calling pyToC<" << demangle(typeid(&(as<T>( args[count]))).name()) << ">" << std::endl;
+  // std::cerr << "Calling pyToC<" << demangle(typeid(typename Arg<T>::ValueT).name()) << ">" << std::endl;
+  // std::cerr << "Calling pyToC<" << demangle(typeid(&(as<T>( args[count]))).name()) << ">" << std::endl;
   //success = success and pyToC< typename Arg<T>::ValueT >( pyArgs[count]
   //                                                      , &(as<T>( args[count])) );
     success = success and pyToC( pyArgs[count], &(as<T>( args[count])) );
-  std::cerr << "success=" << success << std::endl;
+  // std::cerr << "success=" << success << std::endl;
     if (not success) {
       message += "\n  " + getString(nth) + " X argument is not convertible to \"" + Hurricane::demangle(typeid(T).name()) + "\".";
       PyErr_SetString( Isobar3::ConstructorError, message.c_str() );