TN3270 Client Session Lost Using PF Keys to Toggle Screens (172801)
The information in this article applies to:
- Microsoft SNA Server 2.11
- Microsoft SNA Server 2.11 SP1
- Microsoft SNA Server 2.11 SP2
- Microsoft SNA Server 3.0
- Microsoft SNA Server 3.0 SP1
This article was previously published under Q172801 SYMPTOMS
When you rapidly press the PF2 and PF12 keys to toggle between host screens
from a TN3270 client, the client's session is lost and the following
error message is displayed:
TN3270E Service Error 505
SNA API verb READ failed. Failure described as:
RUI read verb has completed with primary rc of Negative Response and
secondary rc of OK
Within an SNA Server TN3270 internal trace, the RUI_READ request is
failing with primary_rc = 0018 (LUA_NEGATIVE_RESPONSE), followed by the
TN3270 server calling RUI_TERM to terminate the session.
CAUSE
Quick toggling of the PF keys causes a race condition, which results in
TN3270 Service receiving LUA_NEGATIVE_RESPONSE error from an RUI function
call. The TN3270 server treats this error as a fatal condition, causing
the TN3270 Server to close the session.
STATUS
Microsoft has confirmed this to be a problem in SNA Server versions 2.11,
2.11 Service Pack 1 (SP1), and 2.11 SP2. A supported fix is now available,
but has not been fully regression-tested and should be applied only to
systems experiencing this specific problem. Unless you are severely
impacted by this specific problem, Microsoft recommends that you wait for
the next Service Pack that contains this fix. Contact Microsoft Technical
Support for more information.
Microsoft has confirmed this to be a problem in SNA Server versions 3.0 and
3.0 Service Pack 1 (SP1). 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):
MORE INFORMATION
With the fix applied, the TN3270 Server treats this error as a non-fatal
condition and keeps the session active.
| Modification Type: | Minor | Last Reviewed: | 7/13/2004 |
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| Keywords: | kbbug kbfix kbnetwork KB172801 |
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