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Thanks, I suspected something of the sort. My batch scripts could have used a value telling me the number of diffs, or somesuch, but it is nothing important. For now, I'll just ignore the return values.

Since I use ExamDiff to compare my current test output to approved test output, there is an ...

When I run ExamDiff (1.6k) from a batch script, I see a positive errorvalue left in the environment after ExamDiff exits. For most DOS programs this indicates that the program quit with an error. But ExamDiff seems to be running fine. I've seen error codes of 3, 20, and 27.

I cannot find any list ...