Oracle Message ORA-07251 - spcre: semget error, could not allocate any semaphores.

ERRORspcre: semget error, could not allocate any semaphores.
CAUSESemget failed to even allocate a single semaphore. Either they are all in use or the system is not configured to have any semaphores.
ACTIONCheck to see if all semaphores are in use. Check to see if system is configured to have semaphores. Check errno.