Oracle Message RMAN-06187 - control file copy string not found or out of sync with catalog

ERRORcontrol file copy string not found or out of sync with catalog
CAUSEThe indicated file is not found, or is found but is not the same file that the recovery catalog thinks it is. It is likely that some operation outside of Recovery Manager has altered the file, or that Recovery Manager has not resynced with the target database.
ACTIONRe-catalog the file and retry the operation.