DOCUMENT:Q191119  07-AUG-1998  [vbwin]
TITLE   :BUG: VB Classes Can Cause IIS to have Access Violations
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:6.0
OPER/SYS:WINDOWS
KEYWORDS:kbVBp600bug kbInternet kbWebClasses

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

 - Microsoft Visual Basic Professional and Enterprise Editions for
   Windows, version 6.0
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SYMPTOMS
========

Internet Information Server (IIS) could have an access violation when
shutting down.

CAUSE
=====

The IIS environment at termination does not guarantee the order of DLL
unloads. As a result the Visual Basic runtime is sometimes unloaded before
it can be cleanly shut down. This results in the access violation. This can
happen sporadically but only if you have the Visual Basic project option
Retain in Memory set On.

RESOLUTION
==========

Turn OFF the project option "Retain in Memory."

NOTE: Even though turning OFF the project option "Retain in Memory" will
stop the IIS Access Violations, you do not want to do this. To get maximum
performance from your WebClasses, you need to have the project option
"Retain in Memory" turned ON.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed
at the beginning of this article. We are researching this bug and will post
new information here in the Microsoft Knowledge Base as it becomes
available.

REFERENCES
==========

Please see the following Microsoft Knowledge Base article for more
information on WebClasses:

   ARTICLE-ID: Q189539
   TITLE     : WebClass Section of VB6 Readme.htm

Additional query words:
======================================================================
Keywords          : kbVBp600bug kbInternet kbWebClasses
Version           : WINDOWS:6.0
Platform          : WINDOWS
Issue type        : kbbug

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

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