RAC 환경에서 Control File 재생성시 Exclusive mode 에러

RAC 환경에서 Control File 재 생성시 아래와 같은 메시지가 표시된다. @con ORACLE instance started. Total System Global Area 285212672 bytes Fixed Size 1273276 bytes Variable Size 92275268 bytes Database Buffers 188743680 bytes Redo Buffers 2920448 bytes CREATE CONTROLFILE REUSE DATABASE "RAC" NORESETLOGS ARCHIVELOG * ERROR at line 1: ORA-01503: CREATE CONTROLFILE failed ORA-12720: operation requires database is in EXC..