Thanks, but I'm still unclear as to why this is happening. Since the $progref variable shares the same scrope with the sub, I don't understand why the sub can't see it. I've read the relevant section of perlsub, and as far as I can tell this should work.

In reply to Re^2: Threads and Shared Variables by hermes1908
in thread Threads and Shared Variables by hermes1908

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