Thanks everyone for replying, you are right, there is a "|" as the file handle is opened...apologize that I missed that when I modified the command before posting :( (open F, "some_shell_expression |";)

With that said, is there still a way for catching that system error with the current code?
Thanks again!

In reply to Re^2: Undestanding this code snippet by Anonymous Monk
in thread Undestanding this code snippet by Anonymous Monk

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