Microsoft KB Archive/161771

= TN3287 Print Emulator Fails Through TN3270 Service =

Article ID: 161771

Article Last Modified on 9/7/2001

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APPLIES TO


 * Microsoft SNA Server 2.11 Service Pack 1

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This article was previously published under Q161771





SYMPTOMS
A TN3287 print emulator may fail to receive host print data when connected through the SNA Server 2.11 Service Pack 1 TN3270 service. The traces may show that the TN3270 service fails to respond to the TN3287 print emulator "Data Query Reply" message.



CAUSE
The TN3287 print emulator is not sending a leading 0x00 byte on the TCP/IP data message sent to the SNA Server TN3270 service. According to the TN3287 specification, the TN3270 service must send a leading 0x00 byte on every data message to the TN3287 emulator. However, the specification does not state that the client TN3287 emulator must also set the leading 0x00 byte.

NOTE: The TN3287 specification is defined in RFC 1646 (which is different from printing support defined in the TN3270E specification, defined in RFC 1647). This problem only occurs with a TN3287 printer.



RESOLUTION
To resolve this problem, obtain the hotfix mentioned below. This updated version does not require a leading 0x00 byte on all data messages sent by a TN3287 print emulator.



STATUS
Microsoft has confirmed this to be a problem in the TN3270 Service included with SNA Server 2.11 Service Pack 1. 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.

Additional query words: prodsna SP1

Keywords: kbbug kbfix kbprint kbnetwork KB161771

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