The Perl compiler is complaining that it only saw File::Find::prune once, so you solve the issue by having your program mention File::Find::prune twice. The warning is intended to catch "odd man out" typos in variable names.

In reply to Re^4: Why $FIle::Find::prune = 1 returns used only once error by jcb
in thread Why $FIle::Find::prune = 1 returns used only once error by h2

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