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redondobch · Posted: Thu Dec 30, 2004 2:10 pm Post subject:

I have an MQ Java app that needs to set the message in group and last message in group flags for messages destined for a z/OS platform. Iâ€™m not having any trouble setting the flags, but this causes the queue manager to create and extended header (format = MQHMDE) and inserts this header in the payload of the message. According to the IBM documentation I should be able to specify a version 2 MQMD, which is equivalent to a version 1 header plus the MDE. Iâ€™ve tried two approaches:

1.) hello_world.setVersion(MQC.MQMD_VERSION_2);
2.) pmo.options = MQC.MQPMO_VERSION_2;

Neither sets MQMD version to a value of 2.

IBMâ€™s documentation is not clear weather z/OS supports a version 2 header. All MQ versions are 5.3. With the version 1 header, the payload has an extra 72 bytes which is the extended header. I really donâ€™t want to have to check for this at the mainframe.

MQ Explorer has no problem viewing the data correctly without the extra 72 byte MDE header.

Has anyone done anything like this? Am I on the right track?