Cause
Length of linear key representation of a high bound of the specified subpartition displayed in this message exceeded the legal limit (4K).
Length of linear key representation of a high bound of the specified subpartition displayed in this message exceeded the legal limit (4K).
Ensure that high bound of every subpartition (except for the last one) collates lower than that of a subsequent subpartition.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
Browse all solutions to database errors from Oracle, MS SQL, or MySQL