If you have the Event Manager application automated to run all scheduled events unattended using scheduling software, such as Microsoft Task Scheduler, all the events may be run and be completed (with or without event errors), but the Event Manager (the process named EventMgr.exe) may continue to run and not exit or end by itself as expected.
Having a previous Event Manager left running when the next scheduled run of Event Manager starts should lead to the failure of starting the next Event Manager on the same computer.
Workaround:
First, confirm all your scheduled events completed and address any event issues by reviewing the Event Log by Date report created specifying the date of the events you want to confirm. Use a second computer with the Event Manager application if necessary to create the Event Log by Date report.
Once you have confirmed all your scheduled events completed and have addressed any event issues, you can use Windows Task Manager to terminate the Event Manager process named EventMgr.exe.
To resolve the issue going forward, this issue can be caused by either of the following
ArticleNumber:
000070466