When using telnet to connect to an IBM mainframe running VSC or VSE, TinyTERM’s TN3270 emulation connects, then immediately disconnects with no errors. The mainframe log shows a variant on one of the following errors, depending on which version of TCP/IP is installed:

TEL911E TN3270 negotiation error type askterm.

TEL967E Negotiation error: Expected FFFB18 received null.

TinyTERM on the same PC has no problems connecting to a mainframe running VM.

CR 776, fixed in TinyTERM Plus 4.7.1, 24 January 2012

This entry was posted on Thursday, May 3rd, 2007 at 9:42 am and is filed under 3270, Telnet. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.