ORA-16001: database already open for read-only access by another instance

ORA-16001: database already open for read-only access by another instance


Cause:


The database has been opened for read-only access by another instance, and cannot be opened for read/write access by this instance.



Action:


This instance must be opened for read/write access, or all other instances must first be shut down and reopened for read-only access.