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ORA-messages
ORA-00026
Common error messages
TNS connection closed
IO error writing block
Resource busy
Invalid character
Invalid datatype
Syntax error
Looping chain synonyms
Resolve connect identifier
number too large for buffer
ORA-01487
ORA-04031
ORA-12545
ORA-06550
ORA-01650
All error messages
OraDev.com
ORA-00026: missing or invalid session ID
Cause: Missing or invalid session ID string for ALTER SYSTEM KILL SESSION.
Action: Retry with a valid session ID.
