ORA-02288: invalid OPEN mode
The error below is syntactical error
RMAN> alter database open resetlog;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of sql statement command at 07/30/2021 21:40:13
ORA-02288: invalid OPEN mode
Give proper syntax while database open
RMAN> alter database open resetlogs;
Statement processed