I sent a colleague a perl script, wrapped in my standard Perl polyglot, and named with a .cmd extension, so that it can easily be run from the Windows command line. This is the wrapper I use, which is based on bat2pl from the ActiveState Perl installation: 
@rem = '--*-Perl-*--
@echo off
perl "%~dpnx0" %*
goto endofperl
@rem ';
#!perl
#line 8
use strict;
use warnings;

# perl code goes here

__END__
:endofperl

[download]
This runs as a batch, and line 3 calls perl with the batch file's full drive, path, name, and extension (that's the %~dpnx0) as the first parameter, and then all other parameters appended after.

She reported back to me that after installing ActiveState Perl 5.8.1.807, she gets the following error: 

Name "main::rem" used only once: possible typo at E:/.../csvsplit.cmd 
+line 1.

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I experimented on my machine, and I could make it do this by putting -w in the perl statement on line 3, and then fix it again by putting -wx in, so I advised her to put -x in the call thus: 
perl -x "%~dpnx0" %*

[download]
Any ideas why her installation gives this error, and mine (same ActiveState version) doesn't?

In reply to Perl Polyglot Problem by PhilHibbs

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