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Database Error Messages

Release

Updated

Oct 13, 2025

ORA-12342

open mounts exceeds limit set on the OPEN_MOUNTS parameter

Cause

The number of currently open mounts exceeds the value you specified on the OPEN_MOUNTS parameter.

Action

Increase the value of the OPEN_MOUNTS parameter so that it accommodates the maximum possible number of open mounts to secondary databases.