Oracle Message PGA-21017 - RRM already active for LU string

ERROR	RRM already active for LU string
CAUSE	The RRM has already been started for the local LU . A second RRM cannot be started for the same local LU.
ACTION	Determine whether the RRM is still active and functioning. If it is not, then it may have terminated without cleaning up. On AIX systems, the /tmp/o/e file may still exist. This will prevent a new RRM from being started. If you have verified that the original RRM is no longer running, you can delete the file to allow a new copy of the RRM to be started.