Cause
SGA_TARGET or MEMORY_TARGET set with DB_BLOCK_BUFFERS set.
SGA_TARGET or MEMORY_TARGET set with DB_BLOCK_BUFFERS set.
Do not set SGA_TARGET, MEMORY_TARGET or use new cache parameters, and do not use DB_BLOCK_BUFFERS which is an old cache parameter.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/3278300
https://community.oracle.com/message/4551958
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