Cause
An attempt was made to detach the current session when it contains references to process private memory.
An attempt was made to detach the current session when it contains references to process private memory.
A session may contain references to process memory (PGA) if it has an open network connection, a very large context area, or operating system privileges. To allow the detach, it may be necessary to close the session's database links and/or cursors. Detaching a session with operating system privileges is always disallowed.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/4412635
https://community.oracle.com/message/1054695
https://community.oracle.com/message/295923
https://community.oracle.com/message/9273960
https://community.oracle.com/message/9446075
https://community.oracle.com/message/2025568
https://community.oracle.com/message/1193289
https://community.oracle.com/message/4497062
https://community.oracle.com/message/1117811
https://community.oracle.com/message/1228927
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