Thank you Olga for your feedback! I added com.jaspersoft.jasperserver.api.engine.scheduling.quartz in de Log Setting with "Debug" as an option. When I checked the logfiles (tomcat7-stdout.log & Jasperserver.log)I noticed the following errors: 2012-09-10 10:50:06,784 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 15856 2012-09-10 10:50:06,790 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 15856 2012-09-10 10:50:06,796 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 4964 2012-09-10 10:50:06,801 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 4964 2012-09-10 10:50:06,807 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 15797 2012-09-10 10:50:06,811 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 15797 2012-09-10 10:50:06,816 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 15915 2012-09-10 10:50:06,819 DEBUG ReportJobsQuartzScheduler,http-apr-8080-exec-3:196 - No trigger found for job 15915 Apprently the jobs are still there with definitions, parameters en schedule but somehow the link between them is corrupt. I still hope that recreating the definitions again is not the only solution since the upgrade has gone smoothly without errors and hope to use the same upgrade-procedure in the future. Does the error ring a bell for someone so that I can reinstate my existing report jobs? Regards. Post Edited by svenvanleke at 10/09/2012 11:05