Error running executable

[Salazaar]

Yes, I know that I was asking for a more specific response. And by the way, which compiler do you use?

I don't use a compiler, I compile everything by console (qmake -o Makefile...). Oh, sure, I'm using XP 2000 HE

What about actionAbout?
Where is that created?

It,s created in ui_maker.h