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ORA-24323:

value not allowed
Cause: A null value or a bogus value was passed in for a mandatory parameter.
Action: Verify that all mandatory parameters are properly initialized.
 SubjectReplies
1.9i : ORA-00020: maximum number of processes (%s...3
2.9i : ORA-00020: maximum number of processes (%s...1
3.ORA-010311