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Q160979: TN3270 Server Does Not Handle Models 3, 4, and 5 Correctly

Article: Q160979
Product(s): Microsoft SNA Server
Version(s): WINDOWS:2.0,2.1,2.11,2.11 SP1
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 12-JUN-2001

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The information in this article applies to:

- Microsoft SNA Server, versions 2.0, 2.1, 2.11, 2.11 SP1 
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SYMPTOMS
========

Various terminal types are supported by the TN3270/e Service. However, if the
emulator requests a 3270 model 3, 4, or 5, the screen may appear to be truncated
or missing characters.

CAUSE
=====

The TN3270 Server does not format SSCP data correctly for models 3, 4, and 5; it
has the following three problems:

- For models 3, 4, and 5 the TN3270 Server should never send the ERASE- WRITE
  command. Instead, it should send the ERASE-WRITE-ALTERNATE command.

- The TN3270 Server has an array containing the 3270 screen addresses.
  Unfortunately, this array is not large enough for model 3 and model 4
  screens.

- There should be a different array for model 5 screens.

RESOLUTION
==========

The TN3270 Server's handling of models 3, 4, and 5 was incorrect. The TN3270
Server now formats these screens correctly. To resolve this problem, obtain the
hotfix mentioned below.

STATUS
======

Microsoft has confirmed this to be a problem in SNA Server versions 2.0, 2.1,
2.11, and 2.11 Service Pack 1. This problem was corrected in the latest
Microsoft SNA Server 2.11 U.S. Service Pack. 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

Additional query words: prodsna

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Keywords          : kbnetwork 
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ200 kbSNAServ211 kbSNAServ210 kbSNAServ211SP1
Version           : WINDOWS:2.0,2.1,2.11,2.11 SP1

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