in reply to IIS 6 and perl 5.8 pipes

I doubt very much that IIS 6 (or any other version) has anything to do with this issue.

Pipes work fine - Most likely, you are missing some PATH information, while running under IIS.

I Suggest that you add "2>&1" to the end of your executed string, so that you can get STDERR - the output would probably point the way.

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