Hi, I have been struggling with looping to change w/l parameters of an nfet in sky130A using ngspice simulations. Somehow the variable used for iterating the loop is not being found and hence not updated. Can someone please suggest what maybe going wrong here and how to correctly update variables and loop. The issues are described in the following link-https://docs.google.com/presentation/d/1S9xONsxgvmFeqJt2jmBulv1w4HZdwnfOBHNXvZVI_qc/edit#slide=id.g2014b667deb_0_6