Hi, We observed that the entries in ACT_RE_PROCDEF were getting deleted. We are trying to display the process instance diagram by calling the activiti-diagram viewer using http://hostname/activiti-explorer/diagram-viewer/index.html?processDefinitionId=&processInstanceId=. We form this URL on runtime subtituting the defn id and instance id. We observed that the processDefinition is null in the diagram layout. When we checked for the process definition id in the database table ACT_RE_PROCDEF, we found the records are missing. do you have any idea why the records got deleted? What could have caused the deletion of records? Thanks!!