The message "TPXL0053 BINDLOST - No CPS on ACT" indicates that TPX has received a BIND that does not have a pointer to a particular active session for a user. This normally indicates that this BIND is a result of a CLSDST/PASS issued by the initial application to which TPX was in session. It also indicates that the ACT that was first found to satisfy this BIND (remember that TPX searches the ACT list in reverse alphabetical order), did not have the "Issues CLSDST PASS" parameter set in it.
Issues CLSDST/PASS parameter:
Indicates whether the application may issue a CLSDST/PASS to another VTAM applid after the initial session to this application is established.
Specifying Y allows TPX to recognize that the aspects of CLSDST/PASS processing are normal and not error situations. If you specify Y and the application type is SHR or GRP, you normally need to specify a substring so TPX can identify the original application session.
If it is impossible to map the applications issuing unexpected BINDs from CLSDST/PASS by a substring you must use type UNQ for the application.