Single Form Feed Sent by Host on LU3 Print Session Is Ignored

ID: Q180862

The information in this article applies to:

Microsoft SNA Server, versions 3.0, 3.0 SP1, 3.0 SP2, 4.0

IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

SYMPTOMS

A single form feed (FF) that is sent by the host on a LU3 printer session is ignored by the SNA Print Server.

CAUSE

The SNA Server Print Service is designed to execute a form feed (FF) included in an LU3 print job when any of the following conditions are met:

If the FF is inserted as the first character after the WCC in a 3270 Erase/Write or Erase/Write Alternate command.

If the FF is located after a valid NL (New Line) order.

If the FF is located after the last printable character position of any print line.

This is by design according to IBM's 3270 Information Display System manual.

RESOLUTION

SNA Server 3.0

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

Q184307 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 SP1, 3.0 SP2, and 4.0. This problem was first corrected in SNA Server 3.0 Service Pack 4.

MORE INFORMATION

The following steps need to be performed to allow a form feed to be executed no matter where it occurs in the LU3 data stream:

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

Apply the hotfix.

Start the Windows NT Registry Editor (Regedt32.exe) and find the following key:


   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
   \SnaPrint\Parameters\

Add the following entry to this key:


   Value Name: DoAllLU3FFs
   Data Type: REG_SZ
   String: True

DoAllLU3FFs should be set to TRUE to allow all FFs to be executed. The String is case-sensitive and must be entered using all uppercase characters for it to function as expected.

Additional query words: LU3 snaprint

Keywords : prodsna kbfix3.00.sp3 snaprintservice
Version : WINDOWS:3.0,3.0 SP1,3.0 SP2,4.0
Platform : WINDOWS
Issue type : kbbug