*.Nsum
The Nsum file is doing the integration of different regions n, p, Nd(a) (activated dopant), Radiative, nonradiative, Auger, and, generation, trap, Positive_charges_sum, Negative_charges_sum The format is
VG VD VS ...to rn ...to rn ...to rn ...to rn ...to rn ...to rn ...to rn ...to rn ...to rn ...to rn
r1 means region 1. r2 means region 2. it will repeat and upto 20 regions