Zlatko
CIW
The times I have had that happen it was either
1) a graphical problem with the last or next item
OR
2) XML problem with the next item - and error in the Class Infos entry or mismatch between the class and default on the Class Infos and in the unit/building Infos.
I have lot's of units and buildings. And i am check next units/building Bomber and Broadcast Tower and i can't see any irregularity. Do you have some another idea or advice ?