in reply to Strange behavior with .plx in PATHEXT

You need to show  assoc .plx and the associated  ftype and show  perl -V:sh

See also on win32 cmd.exe shell pipe | pl2bat, ftype/assoc

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Re^2: Strange behavior with .plx in PATHEXT
by ccw (Initiate) on Feb 20, 2012 at 23:40 UTC

    assoc .plx => PerlScript

    ftype PerlScript => perl.exe %1 %*

    perl -V:sh => sh='cmd /x /c';

    All standard and unchanged for a long time.