Error Message unclear for Module code

[DerrickSaltFish]

In this example, I keyed in add /m SWEEE2201 /c 4 /y y2s2, it gives out the error message that module code should be alphanumeric, but the module code I gave is alphanumeric. So I feel that the error message didn't give the proper error. The user might not know what goes wrong with that error message.

(I am not sure it's a documentation bug or feature flaw, I just put it under feature flaw anyway!)