[cafard]

Upvoted.

Many years ago, we were installing an ERM system, when we discovered that it would not run payroll--or rather, it would run payroll for every employee except for the two who were in a certain jurisdiction. The very expensive consultants who were overseeing the implementation did not have any useful ideas on how to resolve this. (Though they did have a useless and time-consuming one.) I figured out how to use the COBOL debugger (called an "animator"), and in a couple of hours located the problem. Perhaps if I knew how to write COBOL printfs, I could have done without the animator, but I was all but illiterate in COBOL.

I have since inherited the care of a WinForms system, and without the Visual Studio debugger I'd be lost there.

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