Cause
Cannot convert the specified unit from/to standard unit for linear distance, angle, or area.
Cannot convert the specified unit from/to standard unit for linear distance, angle, or area.
Check the unit specification and respecify it.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/4309833
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