DDEML: Memory Leak in Global Shared Memory

• Microsoft Windows NT Workstation version 4.0
• Microsoft Windows NT Server version 4.0
• Microsoft Windows NT Server version 4.0, Terminal Server Edition

SYMPTOMS

A DDEML client performing frequent Connect/Advise operations alternating with frequent Unadvise/Disconnects on the same server, topic, or item may cause the server to leak globally shared memory. The leakage will progress until there will be insufficient resources to run any applications besides the server. At this point, the server must be closed to free up memory.

CAUSE

When the client DDEML window is destroyed by a call to DdeDisconnect, there are still posted messages in the queue to this window, causing this leak.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, please see the following article in the Microsoft Knowledge Base:

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Keywords : NT4SP4Fix kbbug4.00 kbfix4.00.sp4 NTSrvWkst
Version : WinNT:4.0
Platform : winnt
Issue type : kbbug