Hi Gabor, Thank you for the feedback. You are right about spelling. I'll fix it. Regarding refactoring: If I understand you correctly your suggestion is to add new function which will wrap error message so the text will be less redundant. I'm not sure about it. From my experience it is better to leave error messages as simple as possible. Since when using functions in error messages it is possible that this function will fail and then you will get confusing error message (from inside function). So as a rule of thumb I never add another functions inside error processing (except the ones which makes message more meaningful). But that's of course just my point of view. It is also possible that I didn't understand your proposition correctly :-) -- Thanks Krzysztof