Cause
The system is not able to drop the baseline since the baseline is in use by a functionality that depends on its existence.
The system is not able to drop the baseline since the baseline is in use by a functionality that depends on its existence.
Note the name of the functionality using the baseline, and check if the functionality still needs the baseline.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/1601877
https://community.oracle.com/message/2118177
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