In Tuxedo ART for IMS, the simulated CHNG is to specify another service name (only) in an alternate PCB. The destination transaction name is not greater than 8 bytes and is truncated to 8 if the limit is exceeded. The tailing blanks are removed too. The transaction name is evaluated as valid if it exists in the imstrans.desc file and has a legal configuration.

If one transaction code in one Tuxedo domain is designed to switch to another service in a different domain, the transaction code to be switched must be defined in the [imstrans.desc] configuration file as a valid transaction but should NOT be advertised with the control of its class.

For program switch, the new target is another transaction code. For conversational program switch, Tuxedo ART for IMS does not have limitation on the spa sizes of the originating code and the target code.