You mentioned "users" (plural)... if two or more people are using the same script simultaneously, and "errfile.txt" is the same path for all of them, you'll have trouble (users will be misinformed and confused by the file's content).

That's easy to fix by making sure that every run uses a unique file name for its log file.

In reply to Re: multiple programs sharing redirected STDERR by graff
in thread multiple programs sharing redirected STDERR by ff

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