diff --git a/EXE_NstPartNesting.cpp b/EXE_NstPartNesting.cpp
index 5a7939c..62d985d 100644
--- a/EXE_NstPartNesting.cpp
+++ b/EXE_NstPartNesting.cpp
@@ -328,6 +328,12 @@ ExeCreateReferenceRegion( int nParentId, int nOutCrvId, bool bBottomUp)
      // prossimo punto
       bFound = PL.GetNextUPoint( &dPar, &ptQ, true) ;
    }
+  // verifiche su box del lato a sinistra
+   const double MAX_WIDTH_SIDE = 200 ;
+   double dLeftDimX = b3Left.GetMax().x - b3Left.GetMin().x ;
+   if ( dLeftDimX > MAX_WIDTH_SIDE) {
+      b3Left.Translate( Vector3d( -dLeftDimX + 0.25 * MAX_WIDTH_SIDE, 0, 0)) ;
+   }
   // costruisco la regione di riferimento
    PolyLine PL2 ;
    if ( bBottomUp) {
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index ddf24f2..1482f84 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ