Cause
Missing or invalid session ID string for ALTER SYSTEM KILL SESSION.
Missing or invalid session ID string for ALTER SYSTEM KILL SESSION.
Retry with a valid session ID.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/5228823
https://community.oracle.com/message/1616456
https://community.oracle.com/message/10605618
https://community.oracle.com/message/10053300
https://community.oracle.com/message/9273960
https://community.oracle.com/message/9546125
https://community.oracle.com/message/2400159
https://community.oracle.com/message/9404017
https://community.oracle.com/message/1226793
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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