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		| Austerlitz44 said: Ok but unfortunately, that does not answer my question concerning the problem which I encounter.
 
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 I was just agreeing with MarkSheppard, But have you tried opening the scenario in the editor, remove the PBYs, add them again and then save it in a open slot? I'm assuming that if its a conversion error and they work in a test scenario then its something to do with the scenario file.