When you try to logon to an application that currently is not available you get a message in the fifth line of the TPX Main menu saying
==> Application not available <==
When this application is not available and is checked for availability using the VTAM INQUIRE APPLSTAT macro you will instead get this message TEN0011:
**********************************************************
* *
* MSGID: TEN0011 *
* *
* CAUSE: APPLICATION FOR SESSION TPX11B *
* IS UNAVAILABLE *
* *
* EXPLANATION: APPLICATION STATE = CLOSED *
* *
* TO PROCEED, EITHER - *
* *
* 1. HIT ENTER - TO GET RECONNECTED *
* *
* 2. RE-ENTER THE COMMAND: *
* *
* ===> *
* *
**********************************************************
You need to acknowledge this panel by pressing ENTER and then you are brought back to the TPX Session screen.
If you do not want to get these messages in the future you need to switch off "Inquire on application status" for this application.