In the SADDLE calculation [18], the distance between the two
geometries is steadily reduced until the transition state is located.
Sometimes, however, the user may want to alter the maximum rate at
which the distance between the two geometries reduces. BAR is a ratio,
normally 0.01, or 1 percent. This represents a maximum rate of reduction of
the bar of 1 percent per step. Alternative values that might be considered
are BAR=0.005 or BAR=0.001, although other values may be used.
See also SADDLE.
If CPU time is not a major consideration, use BAR=0.001.