Everything seems to build correctly now. But I've followed the same workflow (adding your -1 and 0 steps) and the error remains the same: 10:12:21,208 INFO [EARDeployer] Init J2EE application: file:/C:/apps/jboss-4.0. | 4.GA/server/jbpm/deploy/jbpm.ear | 10:12:21,228 ERROR [MainDeployer] Could not initialise deployment: file:/C:/apps | /jboss-4.0.4.GA/server/jbpm/deploy/jbpm.ear | org.jboss.deployment.DeploymentException: Invalid module content, must be one of | : ejb, web, java, connector, service, har, It seems that war is not a recognized module type for the application.xml, at least for what's recognized by my Jboss (and it's the one installed using jbpm itself). It sound really strange that the host operating system could be the cause (as it's failing in my solaris and windows deployments). Aren't you able to reproduce the error following the same steps: 1.-Checkout a fresh CVS HEAD. 2.-Delete the ${user.home}/jbpm/repository/jbpm directory. actually the clover subdirectory doesn't have to be deleted. but the other directories might contain old versions of snapshot builds that are used instead of the newly stuff that is build from the sources. 3.-Do ant get.dependencies in the build/build.xml 4.-Run 'ant package' at jpdl/dist. 5.-Run 'ant install.jboss.and.configure.jbpm' in 'jboss/configuration' A fresh jboss install appeared at C:\apps\jboss-4.0.4.GA 6.-Run 'ant' at 'enterprise/ear' to get the jbpm.ear built. 7.-Inside C:\apps\jboss-4.0.4.GA\server\jbpm\deploy: Delete the jbpm-console.war (as it is included in the jbpm.ear) Copy the generated jbpm.ear at ${user.home}/jbpm/repository/jbpm/enterprise\3.2-Alpha1-SNAPSHOT to C:\apps\jboss-4.0.4.GA\server\jbpm\deploy. 8.-Start jboss running: C:\apps\jboss-4.0.4.GA\bin\run.bat -c jbpm Regards. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972842#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...