LUA Program Hangs After Receiving Exception Request (EXR)

• Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2

SYMPTOMS

An SNA Server LUA application may hang indefinately after receiving an exception request (EXR) message on a session, which SNA Server sends to the client after it has detected a bad RU in an outbound message from the host.

CAUSE

If the host sends a bad RU on a session, the SNA Server changes the message to Exception Request type (EXR) before sending it to the LUA application. However, SNA Server was failing to set the End Chain (EC) indicator on the EXR message, causing the LUA application to hang indefinately waiting for EC to be received.

STATUS

Microsoft has confirmed this to be a problem in SNA Server 3.0 (including SP1 and SP2).

This problem was corrected in the latest SNA Server version 3.0 U.S. Service Pack. For information on obtaining this Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words:

Keywords : prodsna snalua kbbug3.00 snaprog kbbug3.00.sp2 kbfix3.00.sp3 kbbug3.00.sp1
Version : WINDOWS:3.0,3.0 SP1,3.0 SP2
Platform : WINDOWS
Issue type : kbbug