diff --git a/EXE_GdbModifySurf.cpp b/EXE_GdbModifySurf.cpp
index 1136f47..715142b 100644
--- a/EXE_GdbModifySurf.cpp
+++ b/EXE_GdbModifySurf.cpp
@@ -755,30 +755,8 @@ MySurfTmCut( int nId, int nSplitterId, bool bInVsOut, bool bSaveOnEq)
    const ISurfTriMesh* pStmCLoc = GetSurfTriMesh( SurfCLoc) ;
    if ( pStmCLoc == nullptr)
       return false ;
-  // eseguo la classificazione
-   INTVECTOR vTriaIn, vTriaOut, vTriaOnP, vTriaOnM, vTriaIndef ;
-   if ( ! pStm->GetSurfClassification( *pStmCLoc, vTriaIn, vTriaOut, vTriaOnP, vTriaOnM, vTriaIndef))
-      return false ;
-  // costruisco la nuova superficie
-   PtrOwner<ISurfTriMesh> pStmNew ;
-   if ( bInVsOut) {
-      if ( bSaveOnEq)
-         pStmNew.Set( MyCreateSubSurfTm( pStm, vTriaIn, vTriaOnP)) ;
-      else
-         pStmNew.Set( MyCreateSubSurfTm( pStm, vTriaIn)) ;
-   }
-   else {
-      if ( bSaveOnEq)
-         pStmNew.Set( MyCreateSubSurfTm( pStm, vTriaOut, vTriaOnM)) ;
-      else
-         pStmNew.Set( MyCreateSubSurfTm( pStm, vTriaOut)) ;
-   }
-   if ( IsNull( pStmNew))
-      return false ;
-  // la sostituisco alla superficie originale
-   if ( ! pGeomDB->ReplaceGeoObj( nId, Release( pStmNew)))
-      return false ;
-   return true ;
+  // eseguo il taglio
+   return pStm->CutWithOtherSurf( *pStmCLoc, bInVsOut, bSaveOnEq) ;
 }
 
 //----------------------------------------------------------------------------
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 449e116..9fb1b9c 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ