ORA-00023: session references process private memory; cannot detach session

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ORA-00023: session references process private memory; cannot detach session

Cause: An attempt was made to detach the current session when it containsreferences to process private memory.
Action: A session may contain references to process memory (PGA) if it has anopen network connection, a very large context area, or operating systemprivileges. To allow the detach, it may be necessary to close the session's databaselinks and/or cursors. Detaching a session with operating system privileges isalways disallowed.