An odd behaviour when playing my mod

[ViterboKnight]

I'm playing with my mod: this contains modifications of XMLs and some extra custom events, but no modification of DLLs or python scripts.

When playing a OCC, my city shows one unhappy face, with the text "We yearn to join our Motherland".
I had no wars, and obviously I didn't conquer any enemy city.

What is it caused by?

 

[cephalo]

Cultural overlap?

 

[ViterboKnight]

The culture bar shows that it's 100% mine.

 

[davidlallen]

I don't know the answer. But you could try "backing out" your xml changes. One by one, move your modified files out of the mod area so that the vanilla files are loaded. If your mod files are not too strongly connected, you should be able to load this way, but there will be fewer changes. It is a painful debugging technique, but at some point the problem will suddenly go away. Then you know which set of changes caused the problem.