ListBuilder Reports Network Error When Sending to Message Builder

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Article ID: 224590 - View products that this article applies to.
This article was previously published under Q224590
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When you batch large numbers of Direct Mail packages, the following error is logged in the Event Viewer:
Event: 12290
The '<name of package>' mailing could not be sent to the Message Builder
because a network error 'The operation timed out' occurred.
The return code was c0029b7c.


ListBuilder runs into a timing issue when applying ACLs to the packages it hands off to the Message Builder service.

This causes the application of ACLs to fail. If this occurs, the Message Builder service does not pick up the packages because they do not have the correct ACLs applied.

ListBuilder interprets this as a network error in communicating with the Message Builder service and the above event results.


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:
  • 152734 How to Obtain the Latest Windows NT 4.0 Service Pack
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:;EN-US;CNTACTMS


Microsoft has confirmed that this is a problem in Windows NT 4.0. This problem was first corrected in Windows NT version 4.0 Service Pack 5.


Article ID: 224590 - Last Review: October 20, 2013 - Revision: 1.1
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