Hi, I have the following SkinScript (greatly simplified): WITH Parties.getPersonForEmail(self.id) COMPUTE party=RESULT WITH self.party COMPUTE member_id=email If getPersonForEmail returns None, the second clause returns AttributeError: party. If I change the first clause to party=RESULT or '', I can change the second to: WITH (self.party is not '') and self.party.email or '' COMPUTE member_id=RESULT But this is both ugly and bad - in the real script I have many clauses using party, so repeating this nonsense in all of them is very wasteful, and also it would be better if party is set to None when a Person is not found. But if party is set to None, the DataSkin considers it to be undefined, so I can't do WITH (self.party is not _.None)... Is there any nicer way of preventing AttributeErrors in clauses that try to access an attribute that was set to None? TIA, Itai -- -- Itai Tavor -- "Je sautille, donc je suis." -- itai@optusnet.com.au -- - Kermit the Frog -- -- 'Supposing a tree fell down, Pooh, when we were underneath it?' -- -- 'Supposing it didn't,' said Pooh after careful thought. --