diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index fe6bb37..0daef95 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/MachMgrRawParts.cpp b/MachMgrRawParts.cpp
index 7a3b617..c551faa 100644
--- a/MachMgrRawParts.cpp
+++ b/MachMgrRawParts.cpp
@@ -189,7 +189,7 @@ MachMgr::AddRawPartWithPart( int nPartId, int nCrvSrfId, double dOverMat, Color
      // calcolo il punto di inserimento nel grezzo
       // determino l'ingombro del pezzo
       BBox3d b3Part ;
-      if ( ! m_pGeomDB->GetGlobalBBox( nPartId, b3Part))
+      if ( ! m_pGeomDB->GetGlobalBBox( nPartId, b3Part, BBF_EXACT))
          return GDB_ID_NULL ;
       // recupero il box del solido del grezzo in globale
       int nRawSolidId = m_pGeomDB->GetFirstNameInGroup( nRawId, MACH_RAW_SOLID) ;
@@ -203,7 +203,7 @@ MachMgr::AddRawPartWithPart( int nPartId, int nCrvSrfId, double dOverMat, Color
    else if ( ( nGtype & GEO_CURVE) != 0) {
      // determino l'ingombro del pezzo
       BBox3d b3Part ;
-      if ( ! m_pGeomDB->GetGlobalBBox( nPartId, b3Part))
+      if ( ! m_pGeomDB->GetGlobalBBox( nPartId, b3Part, BBF_EXACT))
          return GDB_ID_NULL ;
      // inserisco il grezzo
       double dZmin = b3Part.GetMin().z ;
@@ -224,7 +224,7 @@ MachMgr::AddRawPartWithPart( int nPartId, int nCrvSrfId, double dOverMat, Color
    else {
      // determino l'ingombro del pezzo
       BBox3d b3Part ;
-      if ( ! m_pGeomDB->GetGlobalBBox( nPartId, b3Part))
+      if ( ! m_pGeomDB->GetGlobalBBox( nPartId, b3Part, BBF_EXACT))
          return GDB_ID_NULL ;
      // deduco i dati del grezzo
       b3Part.Expand( dOverMat, dOverMat, 0) ;