KB180862 - Single Form Feed Sent by Host on LU3 Print Session Is Ignored

Article ID: 180862

Article Last Modified on 10/28/2006

Microsoft SNA Server 3.0 Service Pack 4
Microsoft SNA Server 4.0
Microsoft SNA Server 3.0 Service Pack 2
Microsoft SNA Server 4.0

This article was previously published under Q180862

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

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

Microsoft has confirmed that this is a problem in SNA Server versions 3.0,3.0 SP1, 3.0 SP2, and 4.0. This problem was corrected in the latest SNA Server version 3.0 U.S. Service Pack and the latest SNA Server version 4.0 U.S. Service Pack. For information on obtaining these Service Packs, query on the following word in the Microsoft Knowledge Base(without the spaces):

S E R V P A C K

MORE INFORMATION

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To include form feeds that are not at the beginning of lines, add the following registry entry. Start the Windows NT Registry Editor (Regedt32.exe) and find this 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

NOTE: If this registry entry exists, it will be used. The only way to disable this registry entry is to remove it.

Additional query words: LU3 snaprint

Keywords: kbprb kbpending KB180862