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I think I stumbled onto the answer. According to this article, the chdir command is not thread-safe. See See the section about 2/3 the way down titled "Altering Perls behavior to be thread-safe, ex::threads::cwd" . They give an example of how to "fix" it, too. In my script, I use "chdir" only if running the ClearCase commands, which explains why it is failing. I'll have to re-examine how I am doing that, or implement the fix in the article above.

In reply to Re^4: creating unknown number of threads and then join results by rudds_perl_habit
in thread creating unknown number of threads and then join results by rudds_perl_habit

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