From: Patrick Dawson <pkdawson AT geocities DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: strange problem
Date: Tue, 25 Mar 1997 07:51:38 -0800
Organization: LI Net (Long Island Network)
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Message-ID: <3337F48A.DF9@geocities.com>
References: <33332701 DOT 1A29 AT uit DOT net>
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Chris Larson wrote:
> 
> I'm having a strange problem with DJGPP(most likely my error).  I am
> reading integer and floating point values into a structure from a text
> file.  If I print the variables to the screen while still in the while()
> loop that reads them in (using fscanf()and fseek()) the values print out
> right, but if I print them out after exiting the while() loop they don't
> retain there value(usually = 0). It also does not always work at all but
> will bomb out with the following message.
> 
> Exiting due to signal SIGSEGV
> General Protection Fault at eip=000087fe
> eax=00000001 ebx=0004f420 ecx=0004f300 edx=88f84d8a esi=000015aa
> edi=00000033
> ebp=0004f398 esp=0004f318 program=C:\ASCREAD\ASCOR.EXE
> cs: sel=00af  base=825ab000  limit=0008ffff
> ds: sel=00b7  base=825ab000  limit=0008ffff
> es: sel=00b7  base=825ab000  limit=0008ffff
> fs: sel=0087  base=000221b0  limit=0000ffff
> gs: sel=00c7  base=00000000  limit=ffffffff
> ss: sel=00b7  base=825ab000  limit=0008ffff
> 
> Call frame traceback EIPs:
>   0x000087fe   __doscan_low+1710
>   0x00008382   __doscan_low+562
>   0x0000814b   __doscan+27
>   0x00002dda   _fscanf+18
>   0x00001806   _load_asc_obj_f+490, line 76 of ascor.c
>   0x00001cbf   _main+43, line 141 of ascor.c
>   0x000023a2   ___crt1_startup+138
> 
> This is what I get when I run symify.  It doesn't always bomb on the
> same line but generally the traceback is always the same.
> If anyone could help I would really appreciate it.
> 
> Thanks in advance - Chris.

You need to run cwsdpmi.exe . I experienced the same problem. Funny
thing is, I get a different error message when trying to compile after
that, oh well. Actually use 'cwsdpmi -p'. Tell me if you get it working.
	You're welcome - Patrick