Microsoft KB Archive/195012

= Queued 3270 Print Jobs May Intermittently Print Incorrectly =

Article ID: 195012

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft SNA Server 3.0 Service Pack 4
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 3.0 Service Pack 3
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1

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This article was previously published under Q195012





SYMPTOMS
Host print jobs printed through SNA Server's Host Print Server may print incorrectly at times. In the reported instance of this problem, two host print jobs were sent to the print server from the mainframe at approximately the same time. One of the print jobs printed correctly, but only part of the other job printed. The actual symptoms may vary.

The problem is most likely to occur when one or both of the following are true:


 * The mainframe sends multiple print jobs to the print server at the same time.
 * The print server has numerous sessions active concurrently so that each one is processing quite slowly.

This problem can affect 3270 print jobs using both LU1 (SCS) and LU3 print sessions.



CAUSE
The 3270 Print Provider (Ppd3270.dll) uses a mechanism for queuing messages received from the host that can allow messages for different print jobs destined for the same print device to be intermixed.



SNA Server 3.0
To resolve this problem, obtain the latest service pack for SNA Server version 3.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

184307 How to Obtain the Latest SNA Server Version 3.0 Service Pack

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):

  S E R V P A C K



STATUS
Microsoft has confirmed this to be a problem in SNA Server versions 3.0, 3.0 Service Pack 1, 3.0 Service Pack 2, 3.0 Service Pack 3, 4.0, and 4.0 Service Pack 1. This problem was first corrected in SNA Server 3.0 Service Pack 4.



MORE INFORMATION
The update improves the 3270 Print Provider's queuing mechanism to prevent this problem from occurring.

Keywords: kbbug kbfix KB195012

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