Error Messages on Sign-on display

I'm playing with the idea of routing interactive jobs into their own
subsystems and additionally "locking" applications to enable access to be
restricted at certain times.

I've managed to create a routing program and the locking part easily
enough, and the jobs get routed to the appropriate subsystem correctly, the
problem I have is that I want to sign off the user and send a program
message stating that "Application XXXX is not currently available - try
again later" and display it on the sign on screen after logging the user
off, in similar fashion to an "incorrect password entered" type message.

Unfortunately, I don't seem to be able to get this to work using a program
message from the routing program. What is the trick to this that I am
missing, presuming it is possible ?

On other question - should I be doing a TFRCTL at the end of the routing
program to remove it from the invocation stack, or will this take place
automatically when the job enters the new subsystem ? My routing program
either signs the user off or does a TFRJOB into the correct subsystem.

Thanks in advance
Evan Harris
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