If you are logged off involuntarily while using IBM® Connect:Direct® via TCP/IP, your problem may be related to the TCP/IP connection not being able to communicate with the DTF. If you see the message TCP/IP SEND error; Connection Lost, and press F1 to see the help for this message, the following text is displayed for message SVTC006I:
Although the TCP/IP protocol does not have a mechanism to send you a console message indicating that the client has been dropped and your session has timed out, you can determine if this has happened to you by looking in the statistics file for a signoff record with an SAFA019I error message that matches your user ID (be sure to enter Y in the CHANGE EXTENDED OPTS field on the SELECT STATISTICS panel or use the ADVANCED SELECT STATISTICS panel, and then enter SO as a record type on the next screen). For more information, go to the IBM Connect:Direct for z/OS® Administration Guide and search for Signon and IUI/API Errors.
IBM Connect:Direct provides an inactivity timer that is based on the number of minutes a user can remain inactive without communicating with the DTF. An administrator can specify this value using the TCP.API.TIMER global initialization parameter. IBM Connect:Direct will only recognize changes made to the TIMEOUT parameter by an administrator. If you attempt to change this parameter and you are not an administrator, you will not be able to sign on. You can determine if this has happened to you by looking in the statistics file for a signon record with an SAFA020I error message that matches your user ID. For more information, go to the IBM Connect:Direct for z/OS Administration Guide and search for Signon and IUI/API Errors.