I've had similar problems, even just coping project files from one computer to another.

I found that if I "Clean" they build configurations, then re-build the app seems to work. My thinking is that the .O (object) files compiled with a "different" compiler are looking for things 'VCL.VIRTUALIMAGELIST.O' in the "wrong" place, Sydney compiled differently than the new x64 in Athens, or something like that.

Anyway: Right click Build Configuration, select Clean. Then Build