The information in this article applies to:
SYMPTOMS
If Microsoft Word or another program cannot open any additional Dynamic Data Exchange (DDE) channels, the following message may be displayed:
CAUSEWhen using DDE to communicate between programs, a separate "channel" or line of communication for each DDE conversation is created. It is possible to have multiple DDE conversations happening at the same time. While there is no absolute limit to the number of DDE conversations that can exist simultaneously, there is a relative limit that depends on the amount of system resources available. This limit varies from system to system. WORKAROUNDMicrosoft provides programming examples for illustration only, without
warranty either expressed or implied, including, but not limited to, the
implied warranties of merchantability and/or fitness for a particular
purpose. This article assumes that you are familiar with the programming
language being demonstrated and the tools used to create and debug
procedures. Microsoft support professionals can help explain the functionality
of a particular procedure, but they will not modify these examples to
provide added functionality or construct procedures to meet your specific
needs. If you have limited programming experience, you may want to contact
the Microsoft fee-based consulting line at (800) 936-5200. For more
information about the support options available from Microsoft, please see
the following page on the World Wide Web: http://www.microsoft.com/support/supportnet/refguide/ To prevent the error message from appearing, terminate each DDE conversation after you are finished using the channel. To terminate a DDE channel, use either of the following commands. Syntax to Terminate a Specific Channel Number
Syntax to Terminate All DDE Channels
For example, the following macro (Sub procedure) uses DDETerminate to close each DDE channel that is initiated.
To reproduce the "Session too complex...." error message, start Word and Excel and run a macro that opens a number of DDE channels without terminating the channels.
REFERENCESAdditional query words: vb
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Last Reviewed: May 13, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |