From: "John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem spawning Pmode/w !!!
Date: Fri, 30 May 1997 22:56:57 +0000
Organization: Two pounds of chaos and a pinch of salt
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Michael D. Ryan wrote:
> 
> I had a program that ran fine under Win95 (Dos shell) but would not
> run with CWSDPMI.  Everytime I ran it with cws, I got GPF at different
> places in my program.  I tested it thoroughly under win95 and could
> not get even 1 gpf.

Such errors are very likely to be caused by NULL pointer dereferences in
your program.  The Windows DPMI host does not protect against such
errors, while cwsdpmi does.  If this does not appear to be your problem,
please post the following:

- Complete description of the problem
- Details about your computer (OS, DOS version, memory managers, other
TSRs, etc.)
- Version number of DJGPP and associated programs
- The smallest code fragment from your program which is sufficient to
generate the error(s).
- Exact copy of a symified crash traceback from the above code

Make sure that you compile your program with the -Wall and -O switches
to make the compiler report as many warnings as possible.  Make sure you
have the most up to date versions of all DJGPP programs.  Without more
details, this is about all I can recommend.  ;)

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