Hi forum, I'm a newbie in activity. I have try install activiti explorer on apache tomcat 7 but can not log into http://localhost:8080/activity-explorer. Please help me to solve this proble. Thanks. The tomcat log is: Feb 28, 2014 12:40:06 PM org.apache.catalina.session.StandardSession writeObject WARNING: Cannot serialize session attribute explorerApp for session 9F8B1B592B05024B8CFCAE5D19248B68 java.io.NotSerializableException: org.activiti.workflow.simple.converter.json.SimpleWorkflowJsonConverter at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330) at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1671) at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1077) at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:430) at org.apache.catalina.session.StandardManager.unload(StandardManager.java:351) at org.apache.catalina.session.StandardManager.stopInternal(StandardManager.java:516) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5655) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)
