Dhaval Shah [https://community.jboss.org/people/shahdhaval2020] created the discussion "How to resolve this issue "java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper"" To view the discussion, visit: https://community.jboss.org/message/795554#795554 -------------------------------------------------------------- Hi all, I am trying a human task example with variables , and i am using this link as a refrence https://community.jboss.org/people/bpmn2user/blog/2011/02/21/jbpm5-exampl... https://community.jboss.org/people/bpmn2user/blog/2011/02/21/jbpm5-exampl... But now the thing is that when i am trying to run this i am getting following error. I am using JBPM5.4 . *Exception in thread "Thread-2" java.lang.ClassCastException: java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper* at org.jbpm.task.utils.ContentMarshallerHelper.unmarshall(ContentMarshallerHelper.java:157)           at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:208)           at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler$1.run(GenericHTWorkItemHandler.java:187)           at java.lang.Thread.run(Thread.java:679) -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/795554#795554] Start a new discussion in jBPM Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]