MS RPC Incorrect Behavior for Frame Following Maybe Frame (228802)

SYMPTOMS

A "dg RPC Request (maybe)" remote procedure call (RPC) frame is sent out from a client as a Maybe request. This may mean that the server is not obligated to respond to such a frame. However, the Microsoft RPC runtime sends out a subsequent "dg RPC Ack:" frame with the same sequence number. From the connectionless protocol data unit (PDU) definitions of the Distributed Computing Environment (DCE) specification:

"A client sends an ACK PDU after it has received a response to an at-most-once request".

RESOLUTION

Windows NT Server or Workstation 4.0

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:

http://www.microsoft.com/windows/servicepacks/ -or-
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:

http://support.microsoft.com/directory/overview.asp

Windows NT Server 4.0, Terminal Server Edition

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

152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.