CONFIG BASIC keyword pair: ListenTo= and Stack= contains a TCP/IP stack name: aaaaaaaa that is not defined to the system.
The stack named: aaaaaaaa is not defined as a valid TCP/IP currently active on the system. The GUI will not be able to connect to the specified stack.
None.
Verify that the values of CONFIG BASIC keyword pair: ListenTo= and Stack= is correct. If not, correct the values and recycle the Application Performance Analyzer Listener started task.