The Centralized Agent upgrade of an Agent fails with an error message like:
20190304/095635.890 - U02000275 Rollback for file '/uc4/RO122/Agents/VVIESUP07_RO122_LX6_02_SYS/bin/ucybsmgr.old.1741006' failed, reason: '2 - No such file or directory'.
The directory depends on your installation of the Agent and the filename can vary. But the filename is something like
<file>.old.<number>.