Date:	Thu, 14 Nov 1996 09:22:58 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To:	Tor Sjowall <tor AT sn DOT no>
Cc:	djgpp AT delorie DOT com
Subject:	Re: cwsdpmi bites Novell
In-Reply-To:	<3289c834.172103423@news.sn.no>
Message-Id:	<Pine.SUN.3.91.961114091401.6763L-100000@is>
Mime-Version:	1.0

On Wed, 13 Nov 1996, Tor Sjowall wrote:

> I have observed something similar with Netware and Microtec compilers.
> When running the Microtec compiler in a dos box in Windows, the
> compiler will from time to time report that it's input files are
> garbage. This only happens when I have other activity in Windows, such
> as opening files or loading programs. Running the compiler again will
> work. Running the same programs without the network does not fail.

This seems like a different problem.  The original poster didn't use 
Windows as far as I could understand.

> As the Microtec compiler use the DOS/4G extender from Rational Systems
> and not cwsdpmi, I suspect that the problem is with Netware or
> highmem/emm386 or windows, and _not_ with the dos extender in djgpp.

Not necessarily so, it might be something specific to DOS/4GW or to the 
Microtec compiler itself, or even with the specific version of Netware.  
There are some subtle aspects of file handling on Windows when you run 
several DOS boxes at once.  In particular, several programs can have the 
same PID (which is the address of the PSP).  Since the file handle of any 
given DOS program is referenced by its PSP, special precautions should be 
made to ensure that a correct handle table is used in the multi-tasking 
environment such as Windows.  If the extender messes with undocumented 
DOS features in a way that fails to account for these aspects, you might 
have problems when several programs do file I/O from different DOS boxes.

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