Dear all, I am new to Kwant and try to play a little with some of the examples. I have a bit of experience in calculating the transmission in SN- or SNS-junction so I tried to play a little with the example in 2.6. "Superconductors: orbital degrees of freedom, conservation laws and symmetries". Something strange come up with it. If I try to calculate the transmission into the superconductor lead by exchanging the calculation of the conductance in line 74 of the example file by data.append(smatrix.transmission((1, 1), (0, 1))) I get an error message which tells me that there exists no second subblock. Nevertheless, it should be possible to calculate the transmission of holes from the normal lead into hole-like quasiparticles in the superconductor lead. (This is what I have intended to do there.) So the question rather is why is there a hole degree of freedom in the normal conductor but not in the superconductor lead?