ORA-09924: Can't spawn process - core dump directory not created properly

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ORA-09924: Can't spawn process - core dump directory not createdproperly
Cause: ORACLE was unable tospawn a background process because the
directory that holds the core dumps produced by ORACLE processes in the event
of exceptions was not created properly.
Action: Examine the directorypointed to by the initialization parameter "core_
dump_dest". Make sure that all of the following is true:
1. The directory exists.
2. The name indeed points to a directory, and is not a file.
3. The directory is accessible and writable to the ORACLE user.