Oracle® Database 11g / 12c / 18c error codes ORA-12341: maximum number of open mounts exceeded

ORA-12341: maximum number of open mounts exceeded

Oracle Error Code: ORA-12341

Cause: The number specified on the OPEN_MOUNTS parameter in the parameter file exceeds the maximum allowed (255).

Action: Change the value of this parameter so that it reflects the actual number of possible open mounts to secondary databases. This must be less than 255.