the "version" of the processDefinition in db is a Long type not a Sting type -------------------------------------------------------------------------------- Key: JBPM-2140 URL: https://jira.jboss.org/jira/browse/JBPM-2140 Project: JBoss jBPM Issue Type: Bug Security Level: Public (Everyone can see) Components: PVM Affects Versions: jBPM 4.0.0.Beta1 Environment: WINDOWS XP Eclipse JBOSS AS 4.2.2GA jbpm 4.0.0 Trunk Reporter: fang changjiang when I call ExecutionService.startProcessInstanceById() , I meet a Exception " exception while executing command org.jbpm.pvm.internal.cmd.StartProcessInstanceCmd@f9d4f7 java.lang.ClassCastException: java.lang.Long at org.jbpm.jpdl.internal.repository.JpdlDeployer.deploy(JpdlDeployer.java:72) " so I debug this call process, I find the root cause of the exception is in this segment " String version = (String) deployment.getObjectProperty(processDefinitionName, KEY_VERSION); " I find in the "jbpm.repository.hbm.xml" have " <property name="longValue" column="LONGVAL_" /> " map. I find in DeploymentProperty class the longValue is long type . so the Long type can't cast to String -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira