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JCL Programs and WebSphere MQ

If your JCL programs do not use DSNRLI, then you must explicitly connect to, and disconnect from, WebSphere MQ using the MQCONN and MQDISC APIs. You need not perform any configuration.

However, if your programs use DSNRLI and you want WebSphere MQ to participate as a resource manager in either a single- or two-phase commit environment, then you need to configure a WebSphere MQ XA resource switch module, which will be associated with the program's unit of work. To establish the correct connection, your program must invoke the DSNRLI functions IDENTIFY, SIGNON, and CREATE THREAD.

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