On first glance, it looks like you're running into a buffering problem. Perl buffers STDOUT by default. The various prints that you've done before invoking system() might still be buffered at the time the program you've invoked starts spewing stuff to STDOUT or STDERR.

To unbuffer STDOUT, add   $|++; to the top of your script, right before the   use strict; that you've accidentally commented out.

In reply to Re: How to do system calls in cgi programs by dws
in thread How to do system calls in cgi programs by Anonymous Monk

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