Tow split steps with two identical transition names cause a violation of unique constraint in JBPM4_EXECUTION table. Process Definition: <?xml version="1.0" encoding="UTF-8"?> | <process key="test" name="test" xmlns="http://jbpm.org/4.0/jpdl"> | <start g="82,38,41,27" name="start1"> | <transition g="-43,-18" name="to fork1" to="fork1"/> | </start> | <fork g="79,112,25,20" name="fork1"> | <transition name="to task1" to="task1" g="-44,-18"/> | <transition name="to task2" to="task2" g="-44,-18"/> | </fork> | <fork g="88,263,65,27" name="fork2"> | <transition name="to task1" to="task4" g="-44,-18"/> | <transition name="to task3" to="task3" g="-44,-18"/> | </fork> | <task assignee="test" name="task1" g="75,189,60,42"> | <transition name="to fork2" to="fork2" g="-43,-18"/> | </task> | <task name="task2" g="163,117,61,31"/> | <task name="task3" g="189,268,59,37"/> | <task name="task4" g="93,340,52,40"/> | </process> | Test code: | ProcessEngine processEngine = Configuration.getProcessEngine(); | RepositoryService repositoryService = (RepositoryService) processEngine.get(RepositoryService.class); | String deploymentId = repositoryService | .createDeployment() | .addResourceFromClasspath("test.jpdl.xml") | .deploy(); | Execution execution = processEngine.getExecutionService().startProcessInstanceByKey("test"); | Task task = (Task)processEngine.getTaskService().findPersonalTasks("test").get(0); | processEngine.getTaskService().completeTask(task.getId(),"to fork2"); | Exception: | Caused by: java.sql.SQLException: Violation of unique constraint $$: duplicate value(s) for column(s) $$: SYS_CT_970 in statement [update JBPM4_EXECUTION set DBVERSION_=?, ACTIVITYNAME_=?, PROCDEFID_=?, HASVARS_=?, NAME_=?, KEY_=?, ID_=?, STATE_=?, SUSPHISTSTATE_=?, PRIORITY_=?, HISACTINST_=?, PARENT_=?, INSTANCE_=?, SUPEREXEC_=?, SUBPROCINST_=? where DBID_=? and DBVERSION_=?] | at org.hsqldb.jdbc.Util.throwError(Unknown Source) | at org.hsqldb.jdbc.jdbcPreparedStatement.executeUpdate(Unknown Source) | at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2435) | ... 39 more | The related jira issue was closed by Ronald but I don't understand why the process definition is indicated as invalid...? http://jira.jboss.org/jira/browse/JBPM-2553 View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4257282#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...