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1997-05-15
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Troubleshooting Exception #6, #12, and #13 Reports
Quarterdeck Technical Note #232 Filename: EX13FLOW.TEC
by Michael Bolton CompuServe: EX13FL.ZIP
Last revised: 4/26/95 Category: QEMM
Subject: Quick troubleshooting procedures for Exception #6,
#12, and #13 messages and system lockups.
This document addresses Exception #6, #12 and #13 reports.
These three Exceptions are so similar in cause, nature, and
solution that they will all be covered by the information
below. Any reference to an Exception in this document
applies to an Exception #6, Exception #12, or Exception #13.
Please note that sometimes QEMM cannot report an Exception to
the screen; instead, a blank screen or a lockup occurs. For
troubleshooting purposes, treat a system lockup or a blank
screen (that accepts no input) to be the same as an Exception
report.
This troubleshooting procedure will isolate and resolve the
conflict most effectively if you are able to reproduce the
conflict at will (i.e., you know of a specific action or series
of actions that will cause the conflict to occur). The reason
for this is that this procedure follows a logical set of tests
to determine when a conflict is occuring and when it is not. A
conflict that randomly occurs is much more difficult to
troubleshoot because you do not know for sure when the
configuration being used is actually resolving the conflict.
Q: What is an Exception report?
Exceptions are generated by the protection mechanisms on your
PC's processor (and not by QEMM), in response to an invalid or
unusual condition. QEMM has the ability to detect exceptions
and display relevant information to the screen. The report
informs you what has happened so that you may take the
necessary steps to resolve the conflict. Without QEMM's
warning, your system may simply have crashed or hung without a
message, or may have become unstable. For more detailed
information about Exceptions themselves, please refer to
Technical Note #142, "QEMM: Exception 13 Explained"
(EXCEPT13.TEC).
Q: How do I resolve the cause of my Exception report?
A: Follow these steps:
1) Run through TROUBLE.TEC. This technical note (found in your
QEMM\TECHNOTE directory) treats almost all potential causes of
Exception reports with which QEMM might be involved, and does
so in a very efficient way. Follow the steps in TROUBLE.TEC to
determine which aspect of your system's configuration is the
cause of the problem. TROUBLE.TEC is a general troubleshooting
guide, and may refer you to still other technical notes to
resolve specific conflicts.
2) If TROUBLE.TEC proves that QEMM is not involved, and Exceptions
or crashes still persist with DOS' memory managers, contact the
publisher of the application that is running when the problem
occurs. Inform the publisher's technical support department
that you have reproduced this problem using both QEMM and DOS's
memory managers. This indicates a problem in which the
specific memory manager is not involved. Contacting the
manufacturer of the program is often the quickest way to
resolve the conflict.
3) If TROUBLE.TEC shows that QEMM is involved with the problem,
but does not point you towards a solution, Quarterdeck's
technical support department is easily reached via electronic
channels such as CompuServe (GO QUARTERDECK), Internet (mail
support@qdeck.com or the USEnet newsgroup
comp.os.msdos.desqview), the Quarterdeck BBS (310-309-3227), or
fax (310-309-3217). When contacting Quarterdeck, be sure to
explain the symptoms of the conflict and the results of the
tests performed while following TROUBLE.TEC.
You can also call our Technical Support line at 310-309-4250
for further assistance. When you call, please be at the
machine that is experiencing the conflict.
******************************************************************
* Trademarks are property of their respective owners. *
* This and other technical notes may be available in updated *
* forms through Quarterdeck's standard support channels. *
* Copyright (C) 1996 Quarterdeck Corporation *
******************** E N D O F F I L E ***********************