Cause
GID column is not of type NUMBER.
GID column is not of type NUMBER.
Alter the table definition such that the column containing the geometry identifier (GID) is of type NUMBER.
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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