Cause
An invalid format specifier was found in the LOG_ARCHIVE_FORMAT initialization parameter. The only characters permitted following the % symbol are s, S, t, and T.
An invalid format specifier was found in the LOG_ARCHIVE_FORMAT initialization parameter. The only characters permitted following the % symbol are s, S, t, and T.
Correct the initialization file and re-start the instance.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/970871
https://community.oracle.com/message/3442950
https://community.oracle.com/message/3136496
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