diff --git a/Icarus/ReferencePanel/ReferencePanelVM.vb b/Icarus/ReferencePanel/ReferencePanelVM.vb
index 0cce7dd..1e4da42 100644
--- a/Icarus/ReferencePanel/ReferencePanelVM.vb
+++ b/Icarus/ReferencePanel/ReferencePanelVM.vb
@@ -115,6 +115,9 @@ Public Class ReferencePanelVM
          ElseIf EgtGetInfo(SelPart.nPartId, KEY_MOVEDPART2, vtMovedPart) Then
             ptOrig = ptOrig - vtMovedPart
          End If
+         ' elimino precedente
+         EgtEmptyGroup(SelPart.nPartReferenceLayerId)
+         ' creo nuovo frame
          Dim nPartFrameId As Integer = EgtCreateGeoFrame(SelPart.nPartReferenceLayerId, New Frame3d(ptOrig), GDB_RT.GLOB)
          EgtSetStatus(nPartFrameId, GDB_ST.OFF)
          ' elimino componente Z
diff --git a/Icarus/SliceManager/SliceManagerVM.vb b/Icarus/SliceManager/SliceManagerVM.vb
index 00a0427..3358c73 100644
--- a/Icarus/SliceManager/SliceManagerVM.vb
+++ b/Icarus/SliceManager/SliceManagerVM.vb
@@ -461,8 +461,11 @@ Public Class SliceManagerVM
             Dim b3Part As New BBox3d
             Dim b3PrintSolid As New BBox3d
             EgtGetBBoxGlob(CurrPart.nPartId, GDB_BB.STANDARD, b3Part)
-            EgtGetBBoxGlob(CurrPart.nPrintSolidId, GDB_BB.STANDARD, b3PrintSolid)
-            Dim nRawId As Integer = EgtAddRawPart(b3PrintSolid.Min, b3PrintSolid.DimX, b3PrintSolid.DimY, b3PrintSolid.DimZ, New Color3d(128, 128, 128, 30))
+            b3PrintSolid = Map.refDispositionPanelVM.GetSolidForReferenceBBox( CurrPart)
+            Dim dRawDimX As Double = Math.Max(b3PrintSolid.DimX, 1.0)
+            Dim dRawDimY As Double = Math.Max(b3PrintSolid.DimY, 1.0)
+            Dim dRawDimZ As Double = Math.Max(b3PrintSolid.DimZ, 1.0)
+            Dim nRawId As Integer = EgtAddRawPart(b3PrintSolid.Min, dRawDimX, dRawDimY, dRawDimZ, New Color3d(128, 128, 128, 30))
             EgtAddPartToRawPart(CurrPart.nPartId, Point3d.ORIG() + (b3Part.Min - b3PrintSolid.Min), nRawId)
             EgtMoveToCornerRawPart(nRawId, b3PrintSolid.Min, MCH_CR.BL)
          Next