[Kwant] Re: How the spin is positioned in the Smatrix?

hello, I copy your code to run with kwant 1.4.2. But, I get the error "IndexError: index 2 is out of bounds for axis 0 with size 2", when calculate data_ud.append(smatrix.transmission((1,1), (0,0))) # transmission lead 0 up to lead 1 down. Did you meet the same problem？