Message queues in independent ASPs

It is recommended that message queues in independent ASPs should not be put into break mode.

When a message queue is in break mode, the break program will not be called if the message queue is not in the thread's library name space when a message is sent to the message queue. The libraries in the independent ASPs in the thread's ASP group plus the libraries in the system ASP (ASP number 1) and basic user ASPs (ASP numbers 2-32) form the library name space for the thread.

When sending an inquiry message to a message queue, the to message queue and the reply message queue both should be either in the system ASP or in the same independent ASP, otherwise the reply may not be sent to the reply message queue if either message queue was taken offline.

Messages cannot be received in these situations:

• from a message queue with a wait time, in an independent ASP that is varied off
• as a reply to an inquiry message sent to a message queue, in an independent ASP that is varied off

A break handing program will not be able to change the library name space for the thread.