"dajevu" wrote : | I'm experiencing a similar problem -- but mine is: org.jbpm.context.exe.VariableContainer; local class incompatible. | | Would you mind sharing what changes you made in Eclipse? I copied over the jbpm-jpdl.jar file from the exploded EAR file under jboss AS, but I still get the same error. Local class incompatible might indicate that different class files are used in two java vms (the one running the client-app and the one running jboss-as for example). This shouldn't be a problem if a class declares a static final attribute serialVersionUid. The command classes in jbpm don't have this attribute. If classes do not specify this attribute compile time matters. In my case, I accidently had put another project which also contained the jbpm-jpdl-source on the build path of the client project (both "projects" being in the same eclipse workspace of course). This caused that the jpdl-jar - which was also on the build path of the client project - was ignored (as projects have a higher class loading precedence in eclipse). I didn't make any modifications to the jbpm source, but compile time was different (as the jbpm classes in the workspace were compiled by eclipse - in opposite to the jbpm-jpdl-jar used on the server side). Hope this helps, Karsten View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4075601#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...