Date: Mon, 19 Apr 1999 10:12:10 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Tobias Weber <towb AT gmx DOT net>
cc: djgpp AT delorie DOT com
Subject: Re: cat.exe: standard output: Invalid argument (EINVAL) ??
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On 18 Apr 1999, Tobias Weber wrote:

> It was plain DOS7 command.com

Huh?  COMMAND.COM doesn't support the `command` expansion.  You
probably mean that you invokd Perl from COMMAND.COM, and Perl used
`cat`, right?

> I think the backtick expansion is done by perl..what exactly
> does the message mean, anyway?!

It means what it says: some library function got called with an
invalid argument (probably a NULL pointer).

I suggested to set the TMPDIR environment variable to point to an
existing, writable directory.  Did you try that?  I think this is your
problem.