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

• Microsoft SNA Server, versions 2.0, 2.1, 2.11, and 2.11 Service Pack 1

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