From: morphine AT server DOT cs DOT jhu DOT edu (Michael Phelps)
Sender: morphine AT server DOT cs DOT jhu DOT edu
Date: Wed, 26 Apr 1995 09:59:23 -0400
To: eliz AT is DOT elta DOT co DOT il, morphine AT server DOT cs DOT jhu DOT edu
Subject: Re: EMM386 Exception
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

>> I'm getting the message "EMM386 Exception #12:  Press ENTER to reboot"
>> when I system() to a program of mine which uses very little memory.  The system
>> has 4MB RAM, and doesn't have this problem when run from DOS.  Any suggestions?
>
>
>Does this happen no matter what program you try to run with system()?  What
>happens if you boot your machine without EMM386?
>
>Can you post the code of the function which calls system()?

It only fails with this particular program, and I have no idea why.  I found 
that when I incorporated that program into the one that system()'ed it (ie,
merged the two programs) it works fine.  But that's not exactly the fix I was
looking for.

void	dispatch(int selection)
{
	char	command_line[100];

	switch(selection)
	{
		....
		case 2:  /* calculate entropy of data series */
			clrscr();
			sprintf(command_line, "entropy %s %d", FILE_PATH,
				resolution);
			/* resolution is a global int, FILE_PATH is a defined
			   string */
			system(command_line); /* execute program */
			break;
		...
	}
}

I have many other case's which perform similar functions with other (similar)
programs, and yet this is the only one that causes the EMM386 error.  I haven't
had access to the target machine for a couple days, but I'll play around with
the EMM386 settings, though.  I'm stumpted on this one.
						---Michael Phelps, MD