When you need information on the status of an Application in an ACL, you can use the function &APPL_INF(ApplicationID).
This function returns one of the following values:
ACTIVE Indicates that the application is defined and is accepting logons. If the application is an internal application
like TPXADMIN or TPXOPER, then the string TYPE=TPX is appended.
INACT Indicates that the application is defined but is inactive.
QUIESCED Indicates that an operator quiesced the application in TPX. New sessions will not be started.
UNDEFINED Indicates that the application is not defined to CA-TPX.
Usage of these variables is normally in a SCAN-Statement where the value is compared against a string. Depending on the result, which is stored in a Condition Code, processing continues.