[I7} Tracing a Condition error/Non-Existant Property

My game gives me the following error on every turn:

A run-time warning appears saying I’ve given a property to something that isn’t allowed to have it. I understand the example it gives but I can’t see any such error in my code. I’ve also searched through the game looking for ‘freight bay condition’ and ‘condition’ and ‘propert’ but can’t find anything explicitly named as such.

How can I trace the error message back to the problematic code?

I’d suggest using >RULES to see what rule is causing the problem, and examining that rule more carefully.

Nailed it! Thanks Daniel.