Cause
ALTER INDEX REBUILD SUBPARTITION contained descriptions of more than one subpartition to be rebuilt
ALTER INDEX REBUILD SUBPARTITION contained descriptions of more than one subpartition to be rebuilt
Remove the illegal option. If you want to add storage to individual [sub]partitions,the ALLOCATE EXTENT clause may be specified with ALTER TABLE OR INDEX MODIFY [SUB]PARTITION statement.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/3229900
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