FACILITY ERR
200,OPTER,Error encountered during message output.
300,UNSET,Status not set in call to ERR_REP (improper use of ERR_REP).
301,BADOK,Status set to SAI__OK in call to ERR_REP (improper use of ERR_REP).
302,BDPAR,Invalid tuning parameter name (improper use of ERR_TUNE).
303,BTUNE,Bad tuning value (improper use of ERR_TUNE).
304,BDENV,Bad ERR environment variable value.
