I`m having exactly the same problem

Fresh install of RTW 1.5 (totally unmoded, even without BI).Tried twice.
Still, i am unable to play a campaign game in Europa Barbarorum. It loads for a certain time, then instant CTD with no error. Even the Windows error message is absent, something wich is really really strange.

Howewer , i was able to play a number of custom battles, and i can say the mod is awesome, too bad that i cannot play a campaign.

I deleted the map.rwm from the RTW vannila, and also the map.rwm from the EB folder, after considering the posibility that the game is unable to use the ones already existing, and needs to generate new ones. But for no use - the campaign will CTD when loading !

I must confess this is the first time i`m having this kind of troubles with a mod.