$ perl mycode.pl 2>1 1> debug.txt

No, that's broken in two ways. First, you are missing an ampersand... (which means your errors are going into the file ./1.) After you fix that, you'll still see the error. Pop quiz: Why?

<Reveal this spoiler or all in this thread>
-sauoq
"My two cents aren't worth a dime.";

In reply to Re^2: Printing Warning Messages Into a File by sauoq
in thread Printing Warning Messages Into a File by neversaint

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