To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Re: Problems
Date:	Mon, 11 May 92 20:15:37 +0100
From:	James Casey <jcasey AT maths DOT tcd DOT ie>
Status:	O

:There seem to be TWO problems which are causing much grief and confusion.
:I thought it might be worth a short posting to clarify and distinguish them
:(at least as I encounter them).
:
:1) Segmentation error or similar (error 14)
:This seems to occurr only with 1.06, and specifically with the 1.06
:extender. I have encountered it when compiling certain files and when
:running various quite large applications. It may well be related to swapping,
:but I can't prove that. It is repeatable, in that running the same program
:on the same data will produce the same error, but not (easily) isolatable
:in that almost any change to the input or program will remove or dramatically
:change the error. I have avoided this by moving back to the 1.05 extender.
:It may have been (in my case at least) related to swapping on a badly 
:fragmented partition.
:


This seems to correlate pretty closely to what I've been getting too. It happens
in programs that use lots of memory, or do large amount of file handling. 
Again, I've a minimum config., I've tried the routines on a 386SX with 4Mb RAM,
and a 40MHz 386DX with 4Mb RAM.  The code ran on a 486DX with 16Mb RAM, so I
think that the error must be in the disk paging mechanism, but I'm not sure.

PS. Is there anywhere that version 1.05 of the dos extender is available for FTP
 for those who only have version 1.06?

james.

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