Thanks for the reply. After changing the configuration as you suggest, I now get the following stack trace: org.jbpm.api.JbpmException: couldn't acquire block of ids | at org.jbpm.pvm.internal.id.DatabaseDbidGenerator.getNextId(DatabaseDbidGenerator.java:65) | at org.jbpm.pvm.internal.repository.RepositorySessionImpl.deploy(RepositorySessionImpl.java:56) | at org.jbpm.pvm.internal.cmd.DeployCmd.execute(DeployCmd.java:47) | at org.jbpm.pvm.internal.cmd.DeployCmd.execute(DeployCmd.java:33) | at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42) | at org.jbpm.pvm.internal.spring.CommandTransactionCallback.doInTransaction(CommandTransactionCallback.java:50) | at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128) | at org.jbpm.pvm.internal.tx.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:77) | at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53) | at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40) | at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55) | at org.jbpm.pvm.internal.repository.DeploymentImpl.deploy(DeploymentImpl.java:91) | | Caused by: java.lang.NullPointerException | at org.jbpm.pvm.internal.id.DatabaseDbidGenerator.acquireDbidBlock(DatabaseDbidGenerator.java:76) | at org.jbpm.pvm.internal.id.DatabaseDbidGenerator.getNextId(DatabaseDbidGenerator.java:63) | which is similar to https://jira.jboss.org/jira/browse/JBPM-2599 that is claimed to be resolved in 4.2 Basically, the commandService in DatabaseDbidGenerator is null. Am I missing some other new piece of configuration? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4265127#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...