Default voltage values need be changed.
With the default device specifications, it seems that the default nanowire has a threshold voltage of ~ 0.6V. So, to drive the device into deep ON state, one should apply gate voltage, probably exceeding 0.8V. So, the default voltage sweep values need be changed. Please consider to set Vd = 0.8V, and Vg,max = 0.8V. However, if you do want to go with the current voltage values, then consider revising the device specifications. May be you need to use a thinner oxide, or a gate with lower workfunction.