For almost one week and many hours I have been frustrated by 'triggers' not working properly and A.I. plans not working at all - not even untriggered movement. I have discovered that the underlying problem appears to be hidden dirty code. What do I mean by that? Well, the problem only arises when you are building a new scenario on top of an existing scenario, i.e. reusing the map and units. The unseen dirty code consists of terrain objectives and triggers assigned to the earlier scenario that have not been properly cleaned up. These may have the false appearance of having been removed if the map was cut down to a smaller size or if the trigger zone was visually erased from the map. However, the code describing the trigger and the link between the now hidden trigger and any attached units remains intact!

. Cutting the map down to size and/or erasing trigger zones is NOT good enough!. @%!? There is a complicated way to back-track and get rid of the trigger code but units formerly attached to the code still remain unresponsive to the new A.I. plan. (gosh! darn! drat! hmph!) I am about ready to walk away from creating scenarios in CM. Too many frustration points. That said, seems the only way to bypass the issue is to make sure you start with a brand spanking new and unused master map. fffft
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