Cause
The regular expression did not have balanced brackets.
The regular expression did not have balanced brackets.
Ensure the brackets are correctly balanced.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/3160450
https://community.oracle.com/message/4517067
https://community.oracle.com/message/11282380
https://community.oracle.com/message/11261515
https://community.oracle.com/message/3407715
https://community.oracle.com/message/9655714
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