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    Oracle Error ORA-00021 – session attached to some other process; cannot switch session

    admin October 13, 2022 No Comments

    Oracle Error Message

    ORA-00021 – session attached to some other process; cannot switch session

    Reason for the Error

    The user session is currently used by others. You will see this error if you attempt to join a session that is already in use by another process.

    Solution

    Be careful not to switch to a session that is connected to another process.

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