I'm not a parallel user but here's some suggestions for things to check (a few are very basic but I don't know what you've tried):

• Is ./test.pl executable?
• Does ./test.pl have a shebang line that is incompatible with your target servers?
• Is ./test.pl trying to read from stdin?
• Does ./test.pl run without errors or warnings if use strict; and use warnings; are used?
• Does calling parallel ... perl ./test.pl work any better?

If none of that helps, please post the ./test.pl code.

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