I downloaded activiti and installed required s/w and ran demo.start. It ran well. To change the db i tried demo.stop demo.clean. It gave error as cannot delete h2.jar. But it deleted apache.tom files. So again downloaded the activiti files and ran in different path. But now it shows error in tomcat as Servelt.server error. Java.null execption. So the http://localhost:8080/activiti-explorer/ etc are not opening. What i am missing? Kindly help me.
