Cause
User issued ALTER TABLE statement attempting to modify data type and/or length of a column used to subpartition the table named in ALTER TABLE statement, which is illegal
User issued ALTER TABLE statement attempting to modify data type and/or length of a column used to subpartition the table named in ALTER TABLE statement, which is illegal
Ensure that the new subpartition name is different from the name of any (including the one being renamed) existing subpartition of a given table or index
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/4480282
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