PathBoundary editor filled with life.

src/Mod/Path/PathScripts/PathJobGui.py

@@ -527,12 +527,16 @@ class StockFromExistingEdit(StockEdit):
 
     def candidates(self, obj):
         solids = [o for o in obj.Document.Objects if PathUtil.isSolid(o)]
-        for base in obj.Model.Group:
-            if base in solids and PathJob.isResourceClone(obj, base, 'Model'):
+        if hasattr(obj, 'Model'): 
+            job = obj
+        else:
+            job = PathUtils.findParentJob(obj)
+        for base in job.Model.Group:
+            if base in solids and PathJob.isResourceClone(job, base, 'Model'):
                 solids.remove(base)
-        if obj.Stock in solids:
+        if job.Stock in solids:
             # regardless, what stock is/was, it's not a valid choice
-            solids.remove(obj.Stock)
+            solids.remove(job.Stock)
         return sorted(solids, key=lambda c: c.Label)
 
     def setFields(self, obj):