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From: "Charles Sandmann" <sandmann AT clio DOT rice DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Running any of the  OpenGUI examples in dos mode crashes...
Date: Fri,  7 Dec 2001  9:37:37
Organization: Aspen Technology, Inc.
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> I didnt see it print out a traceback dump. :-(

That makes it harder - you will either need to try and run it in a debugger
to find where it crashes, or add some debugging statements.

> Do you think its possible if I could fix this by going back to the src
> proggy and CHANGING what the video mode was being changed to?

No - the problem happens before the video mode is set - the code has set
the ES register to be an invalid value before calling this interrupt.  
If you put a "push ds; pop es" instruction sequence before the _dpmi_int 
call (or the assembly call to int 31, whichever was done) it should 
fix the problem.  Since ES is wrong, I suspect some bad assembler?

> or should I try an older version of the cwsdpmi?

No version of CWSDPMI (or any other DPMI provider) will fix this, 
it's a program bug.