diff --git a/Machine.cpp b/Machine.cpp
index 8552db3..fdf6edd 100644
--- a/Machine.cpp
+++ b/Machine.cpp
@@ -137,9 +137,7 @@ Machine::Init( const string& sMachineName, const string& sMachineDir, MachMgr* p
   // in caso di errore, cancello tutta la geometria
    if ( ! bOk) {
       m_pGeomDB->Erase( m_nGroupId) ;
-      m_pGeomDB->Erase( m_nTempGroupId) ;
       m_nGroupId = GDB_ID_NULL ;
-      m_nTempGroupId = GDB_ID_NULL ;
       m_sName.clear() ;
       m_sMachineDir.clear() ;
    }