S-parameter and port BC

Hi everyone
I am studying the emissivity of a surface. In order to consider higher orders of reflection or transmission, we need to add several port BCs. for example in my case I am trying to obtain the reflectivity and transmissivity for m=0,+-1,+-2,+-3 orders. in this case we need to define 14 port BC.
in this case, for example, " abs(emw.S11)^2 " gives the zero order reflectivity. But for orders higher than 2 we can not define such expression. In fact, COMSOL does not accept " abs(emw.S101)^2 " which refers to the row 10 and column 1 of the S-matrix. We can define only the following expressions:
abs(emw.S11)^2
abs(emw.S21)^2
abs(emw.S31)^2
abs(emw.S41)^2
abs(emw.S51)^2
abs(emw.S61)^2
abs(emw.S71)^2
abs(emw.S81)^2
abs(emw.S91)^2
I need to define the following expressions as well but after typing the turn to orange
abs(emw.S101)^2
abs(emw.S111)^2
abs(emw.S121)^2
abs(emw.S131)^2
abs(emw.S141)^2

does anybody knows what is going wrong?