The emctl file in the oraclehome cannot be renamed from emctl.bat to emctl_upgrade.bat
the issue: upgrading your OEM agent from 12.1.0.3 to 12.1.0.4 and you’re getting this at the end of your log
cause and solution: the issue is caused by a known bug. go through the agent upgrade console again (setup –> manage cloud control –> upgrade agents) and input “EMCTL_RENAME=false” in the Additional Parameter section like this