def METHOD_NAME():
    net = pp.create_empty_network()
    b1, b2, l1 = add_grid_connection(net)
    b3 = pp.create_bus(net, vn_kv=20.)
    l2 = create_test_line(net, b2, b3)
    create_test_line(net, b3, b1)
    pp.create_switch(net, b2, l2, et="l", closed=False)
    pp.create_switch(net, b3, l2, et="l", closed=False)
    pp.rundcpp(net)
    assert np.isnan(net.res_line.i_ka.at[l2]) or net.res_line.i_ka.at[l2] == 0