Do you have any info on the nature of cmd.exe's issues?
I wish I did. Here's what perldoc pl2bat has to say about it: 
---8<---
4
      C:> ftype Perl=perl.exe "%1" %*
      C:> assoc .pl=Perl
      then
      C:> script.pl [args]

5
      C:> ftype Perl=perl.exe "%1" %*
      C:> assoc .pl=Perl
      C:> set PathExt=%PathExt%;.PL
      then
      C:> script [args]
---8<---
4 and 5 work on some Win32 operating systems with some command shells.
One major disadvantage with both is that you can't use them in pipelin
+es
nor with file redirection. For example, none of the following will wor
+k
properly if you used method 4 or 5:

    C:> script.pl <infile
    C:> script.pl >outfile
    C:> echo y | script.pl
    C:> script.pl | more

This is due to a Win32 bug which Perl has no control over. This bug is
the major motivation for pl2bat [which was originally written for DOS]
being used on Win32 systems.

[download]
To paraphrase, it doesn't work because it doesn't work. ;)

All I can see (from this and some searching of MSDN) is that redirection and pipes break when you use ftype and assoc to run a script. I have never seen a why. It's useful information, just not very informative.

In reply to Re^3: Strange "There is not enough space on the disk" error (Win32) by bmann
in thread Strange "There is not enough space on the disk" error (Win32) by bgreenlee

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