3270 Emulator Hangs and Returns X'1003' Error to Mainframe (182915)
The information in this article applies to:
This article was previously published under Q182915 SYMPTOMS
A 3270 emulator may hang while receiving a screen of data from a
mainframe.
The emulator screen may be partially filled with data when the
emulator
hangs. The SNA Server computer that the emulator is connecting
through logs
a message similar to the following in its Application Event log:
Event ID: 21
Source: SNA Server
Description: (1124) Negative Response Sent on Connection <connection
name> (SENSE = 1003).
SUBCODE INFORMATION:
X'1124' A negative response was sent and logged. This error
normally follows a more specific error message, depending on the type of
negative response sent and its cause. The SNA sense data provides details
about the type of error.
This problem does not occur if the emulator connects to a
mainframe through SNA Server 3.0 SP2 and earlier.
In addition, this problem may not occur with all 3270 emulators.
This problem has been reproduced using NetSoft's NS/Elite 3270
emulator. It could not be reproduced using the 3270 Applet included with SNA
Server. CAUSE
SNA Server 4.0 incorrectly sets the ECI (End Chain Indicator) and
CDI (Change Direction Indicator) flags on the first segment of an RU
(Request/Response Unit) sent to a 3270 emulator that has indicated
that it can receive RU segments.
When delivering RU segments, EC (End Chain) and CD (Change
Direction) indicators are supposed to be delayed if they occur in the RH
(Request/Response Header) of the RU's first segment until the last
segment of the RU is sent to the emulator.
STATUSMicrosoft has confirmed that this is a problem in SNA Server 4.0.
This problem was corrected in the latest SNA Server version 4.0
U.S.Service Pack. For information on obtaining this Service Pack,
query on the following word in the Microsoft Knowledge Base (without the
spaces):
Modification Type: | Major | Last Reviewed: | 10/22/2003 |
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Keywords: | kbbug kbfix KB182915 |
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