Another thing that is always worth doing is ensuring that
you have absolute paths for all executables i.e. try
"| /usr/bin/perl /path/to/my/file.pl"
Also if your script uses any modules it is a good idea to
make sure that the necessary environment variables are set
first (try running your script after
unsetenv PERLLIB
unsetenv PERL5LIB
Of course if your shell is not csh or tcsh then
translate this to your own version)
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