Code ESQL to access message objects when you configure a message flow to process messages that are parsed according to migrated message models.
If you have migrated message models that you created in WebSphere® MQ Integrator Version 2.1 or WebSphere MQ Integrator Broker Version 2.1, the models created by mqsimigratemsgsets command include objects that you cannot create in the model in Version 5.0.