Oracle Message RMAN-02000 - wrong message file version (msg number not found)

ERRORwrong message file version (msg number not found)
CAUSEThe rmanxx.msb file is not the correct version.
ACTIONCheck that the installation was done correctly. The RMAN binary (executable, load module, whatever it is called on your O/S) and the rmanxx.msb file must be from the same version, release, and patch level.

634134Error due to incorrect or missing message files