Thank you, now codeblocks runs :-D
But one question: How can I prevent such errors without always having to build everything ? Usually make should rebuild the dependent files, or is this error something special (perhaps because xrc files are data and no source files) ?
EDIT: Or the question in another way: How can I see that there will be problems ? I think if the .xrc file changed and no source file in the same directory, this should be an indicator. But how to see it more exactly, which source file needs which .xrc ?