"barnaby33" wrote : | 4)Turn on Jboss server. (During startup JMS system barfs on the two records with null blobs. I worked around this by modifying the select query to only return messages with non-null blobs.) | I don't understand that. The write with null blob and update the blob are in the same transaction so they should either work together or not at all. The major/minor stuff is just you compiling with the wrong version of java (e.g. JDK5) for the version you want run with (e.g. JDK1.4). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077792#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...