I posted a question about a problem a was having with a EJB application i was migrating from WAS6 to WAS8.5.5, here is the link:
Message selector on MDBean not working properly
And I found that a had a prior version of WMQ (v6), so i upgraded that version to v7 and my application worked.
My question is, isn't WAS 8.5.5 suppose to support prior version of WMQ ?
The MQ Resource Adapter that is deployed within WAS 8.5.5 will be supported back to earlier verfsion of MQ. Full details are available here http://www-01.ibm.com/support/knowledgecenter/prodconn_1.0.0/com.ibm.scenarios.wmqwasusing.doc/topics/swg21498708_85.htm
Upgrading to WMQ v6 would be recommdened however as MQ v6 is not longer a supported version.