Knowledge Base

RUI Library Terminates RUI Session When PIU Has Not Been Sent

Article ID: 163019

Article Last Modified on 11/4/2003

Microsoft SNA Server 2.11 Service Pack 1
Microsoft SNA Server 3.0 Service Pack 4

This article was previously published under Q163019

SYMPTOMS

Under certain conditions, an LUA session may terminate unexpectedly with the following error message:

Event ID: 1954
Source: SNA RUI Application
Description: RUI internal logic error for LU <name>, code <value>

CAUSE

When the SNA Server service informs the RUI library that a Path Information Unit (PIU) has not been sent due to some problem (such as a bracket error), the RUI library terminates the RUI session. RUI internal logical error 1954 is logged in the application Event Log.

RESOLUTION

A fix is available to correct this problem.

STATUS

Microsoft has confirmed this to be a problem in Microsoft SNA Server versions 2.11 Service Pack 1 and 3.0. This problem was corrected in the latest SNA Server for Windows NT 2.11 and 3.0 U.S. Service Packs For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

MORE INFORMATION

The RUI library posts RUI_WRITE as complete once it has passed the data to the SNA Server service, instead of waiting for the SNA Server service to actually process the data. In this situation, it is possible that the PIU has not yet been sent. For example, this may be the case due to a race condition with the host application. When the SNA Server service informs the RUI library that the PIU has not been sent, the RUI library terminates the RUI session because it was already informed that the RUI_WRITE was completed successfully.

Additional query words: prodsna 2.11.sp1 3.00 WINRUI SP1 LUA

Keywords: KB163019