diff --git a/NestProcess.lua b/NestProcess.lua
index 05b81f9..ade3914 100644
--- a/NestProcess.lua
+++ b/NestProcess.lua
@@ -1,4 +1,4 @@
--- NestProcess.lua by Egaltech s.r.l. 2021/05/21
+-- NestProcess.lua by Egaltech s.r.l. 2021/05/25
 -- Gestione nesting automatico pareti
 
 -- Intestazioni
@@ -222,8 +222,10 @@ for nPartId, nCount in pairs( PART) do
             EgtErase( OutId + i - 1)
          end
       end
-      EgtSetName( OutId, 'ON_TMP')
-      nOutline = OutId
+      if OutId then
+         EgtSetName( OutId, 'ON_TMP')
+         nOutline = OutId
+      end
    end
    
    if nOutline then