Thanks All. Changing the receiver endpoint to use an "InOnly" exchange pattern solved the problem. E.g. -
<camel:endpoint id="jmsMQReceiverEndPoint" uri="jmsQueue:queue:${mq.receiver.queue}?testConnectionOnStartup=true&disableReplyTo=true&exchangePattern=InOnly" /> -- View this message in context: http://camel.465427.n5.nabble.com/JMS-Websphere-MQ-Error-MQJE001-Completion-Code-2-Reason-2027-tp4713509p4728417.html Sent from the Camel - Users mailing list archive at Nabble.com.