16-Bit Visual Basic Programs Are Not Unloaded

ID: Q192515

The information in this article applies to:

SYMPTOMS

When multiple instances of a 16-bit Microsoft Visual Basic program are run at the same time and then shut down, they all seem to close; however, the program may still appear in the task list. Once a computer has experienced this problem, the operating system can become unpredictable and may need to be rebooted to clear up the problem.


CAUSE

The Compobj.dll file, which is part of the Distributed Component Object Model (DCOM) protocol, may not decrement an instance counter and never fully unload the Visual Basic program.


RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression tested and should be applied only to computers experiencing this specific problem. To resolve this problem immediately, contact Microsoft Technical Support to obtain the fix. If you are not severely impacted by this specific problem, Microsoft recommends that you wait for the next service pack that contains this fix.

For a complete list of Microsoft Technical Support phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/support/supportnet/default.asp


This fix should have the following file attributes: 


   Date      Version   Size     File Name
   ----------------------------------------
   8/18/98   2.3.2     31,184   Compobj.dll


This file is from DCOM build 2713, for English language versions of Windows.

NOTE: If you contact Microsoft to obtain this fix, a fee may be charged. This fee is refundable if it is determined that you only require the fix you requested. However, this fee is non-refundable if you request additional technical support, if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:

ARTICLE-ID: Q154871
TITLE: Determining If Your Product Is Eligible for No-Charge Technical Support



STATUS

Microsoft has confirmed this to be a problem in the Compobj.dll file prior to version 2.3.2


MORE INFORMATION

You can also see the processes using .dq with the Windows 95/98 WDEB debugger.

Additional query words: VB VC Hang freeze QBASIC OCX 


Keywords          : win95 win98 
Version           : WINDOWS:95,98
Platform          : WINDOWS 
Issue type        : kbprb

Last Reviewed: January 28, 1999