Non-sequential trace. Src# refers to the object number of the desired source. If Src# is zero, all V2i@.@$j
sources will be traced. If Splt? is non-zero, then splitting is on. If Scat? is non-zero, then scattering w);6K[+;
is on. If Pol? is non-zero then polarization will be used. If splitting is on polarization is automatically 4y5UkU9|
selected. If IgEr? is non-zero, then errors will be ignored