It looks like you are unintentionally attempting to send InOut Message Exchange Pattern to JMS. Try explicitly setting the pattern to InOnly as follows:
<to uri="activemq:queue:qFoo_In" pattern="InOnly"/> /Ron -- View this message in context: http://camel.465427.n5.nabble.com/Camel-HL7-to-ActiveMQ-AND-ACK-tp505618p509678.html Sent from the Camel - Users mailing list archive at Nabble.com.
