Article ID: 198573 - View products that this article applies to.
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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.
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.
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:
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.
Article ID: 198573 - Last Review: November 2, 2013 - Revision: 3.0