Non-sequential trace. Src# refers to the object number of the desired source. If Src# is zero, all 'huLv(Uu
sources will be traced. If Splt? is non-zero, then splitting is on. If Scat? is non-zero, then scattering kgu+q\?
is on. If Pol? is non-zero then polarization will be used. If splitting is on polarization is automatically $p@g#3X`
selected. If IgEr? is non-zero, then errors will be ignored