Article ID: 195009 - View products that this article applies to.
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/256986/EN-US/ )Description of the Microsoft Windows Registry
After applying Windows NT 4.0 Service Pack 4 (SP4) or Windows 2000, you encounter lockups or access violation (Dr. Watson) errors in an application that appeared to be working fine previously.
NOTE: You might encounter other symptoms or errors in an application that relate to the below-mentioned cause.
The application in question is errantly trying to access a block of memory that it had previously freed or deallocated. With Windows NT 4.0 Service Pack 3 (SP3) and earlier, such a reallocation is more likely to succeed, since the same memory location is more likely to still be available for reallocation. SP4 and later, however, introduces a change in the heap manager allocation patterns that can result in a failure of such a reallocation request. For more information on this change, please see the following article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/195008/EN-US/ )Heap Manager Change in Service Pack 4
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To determine if the above-mentioned change is exposing a problem in the application in question, proceed with the following steps. If these steps result in the application generating fewer or no more such errors, contact the vendor of the application to inquire about an updated version of the application that resolves this problem.
NOTE: There are other conditions that can cause such errors or hangs that are not related to this change introduced in SP4 and Windows 2000. If the following workaround does not correct the problem, query on the error or condition you are encountering and the application name in the Microsoft Knowledge Base and/or check with your application vendor for more information on any other known problems.
Article ID: 195009 - Last Review: October 26, 2013 - Revision: 3.0