DOCUMENT:Q138786  31-JUL-2001  [visualc]
TITLE   :PRB: Just-In-Time Debugging Launches Wrong Debugger
PRODUCT :Microsoft C Compiler
PROD/VER:4.0 5.0 6.0
OPER/SYS:
KEYWORDS:kbtshoot kbDebug kbide kbVC500 kbVC600

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual C++, 32-bit Enterprise Edition, versions 5.0, 6.0 
 - Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 6.0 
 - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

Although Just-In-Time (JIT) debugging is enabled in the Developer Studio, a
debugging utility other than the Developer Studio is invoked when an illegal
operation occurs in Windows 95.


CAUSE
=====

In Windows 95, the Developer Studio uses the Win.ini file to maintain the
just-in-time debugging settings. If the following registry key exists in your
Windows 95 registry, its settings will preempt the settings in the Win.ini
file:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\Current Version\AeDebug

RESOLUTION
==========

Delete the following registry entry to allow Visual C++ just-in-time debugging
to be invoked:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\Current Version\AeDebug

STATUS
======

This behavior is by design.

MORE INFORMATION
================

In Windows NT, this information is kept only in the registry.

In Windows 95, it is necessary for this information to be placed in the Win.ini
file only. Installing the Win32 SDK on a computer that is running Windows 95
will create a registry key and cause the problem described. Use Regedit.exe to
delete the key from the registry.

The following entries should exist in the Win.ini file:

   [AeDebug]
   Auto=0
   Debugger=c:\msdev\bin\msdev.exe -p %ld -e %ld

The path to Msdev.exe may be different on your computer. The Win.ini file is
located in your Windows directory.

REFERENCES
==========

The Readme for Microsoft Visual C++ Version 4.0.

Additional query words:

======================================================================
Keywords          : kbtshoot kbDebug kbide kbVC500 kbVC600 
Technology        : kbVCsearch kbAudDeveloper kbVC500 kbVC600 kbVC32bitSearch kbVC500Search
Version           : 4.0 5.0 6.0
Issue type        : kbprb

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2001.