>>We have several general applications developed for our company by one developer (contractor). Lately the company was cutting its expencies on the project, so this developer was put out of picture (for my regret, BTW). Now I identified few bugs in the software. These bugs are minor and not cruicial, but still need to be fixed. For the original developer fixing of those bugs may take ~3h. For other developers this time may be trippled.
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>In what you said, it seem that the devloper was cut in the middle of the project.

I missed that point.

>How can you ask him to debug an incomplete application free of charge?

Good point, if he was cut then he's entitled to charge.