er parameters required (use &quot;none&quot; as 1st parameter)
         setforce
                (1) x component of set force (in force units)
                (2) y component of set force (in force units)
                (3) z component of set force (in force units)
         addforce
                (1) x component of added force (in force units)
                (2) y component of added force (in force units)
                (3) z component of added force (in force units)
         aveforce
                (