Cause
Extent type should be represented by two points: lower left and upper right.
Extent type should be represented by two points: lower left and upper right.
Confirm that there are only two points for an extent type.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/27079
https://community.oracle.com/message/2505758
https://community.oracle.com/message/130892
https://community.oracle.com/message/1324003
https://community.oracle.com/message/145011
https://community.oracle.com/message/289003
https://community.oracle.com/message/10715568
https://community.oracle.com/message/171932
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