The OP will want to ammend their code to print the errors to STDERR so that they can be redirected with >2 output.txt. Normal output is still printed to STDOUT (usually the console).

E.g. 

print STDERR "This didn't work as expected!\n";

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In reply to Re^2: How do I output error messages to a file? by inman
in thread How do I output error messages to a file? by tphyahoo

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