diff --git a/src/Mod/CAM/Path/Op/Slot.py b/src/Mod/CAM/Path/Op/Slot.py
index 9f6d2a719e..3621149d0a 100644
--- a/src/Mod/CAM/Path/Op/Slot.py
+++ b/src/Mod/CAM/Path/Op/Slot.py
@@ -564,6 +564,10 @@ class ObjectSlot(PathOp.ObjectOp):
         cmds = self._makeOperation(obj)
         if cmds:
             self.commandlist.extend(cmds)
+        else:
+            # clear Path if can not create slot
+            self.commandlist.clear()
+            return False
 
         # Final move to clearance height
         self.commandlist.append(