16-bit Windows-Based Programs Support Up to 26 DDE Connections
Article ID: 198573
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Server 4.0 Enterprise Edition
This article was previously published under Q198573
SYMPTOMS
A 16-bit Windows-based application, which uses many DDE connections, fails
after a while when running on Windows NT. The application works correctly
on Windows 3.1.
CAUSE
After more than 26 concurrent DDE connections have been created, an error
0x400f (a system API failed inside of the DDEML) is returned when closing
the twenty-seventh connection. This problem is due to a timer, which is
associated with a window, not being freed when the relevant window is
destroyed.
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or
the individual software update. For information on obtaining the
latest service pack, please go to:
For information on obtaining the individual software update, contact Microsoft
Product Support Services. For a complete list of Microsoft Product Support
Services phone numbers and information on support costs, please go to the
following address on the World Wide Web:
STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.
Additional query words: Exchange Dynamic Data 4.00 WOW DMLERR_SYS_ERROR
Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB198573