On Fri, 8 Apr 2022, Sven Schreiber wrote: That's now fixed in git. The functions Im() and Re() were assuming matrix input but not checking for it, and therefore crashing on scalar input as in your example. They now accept scalar input -- in line with our policy that scalars and 1 x 1 matrices should be as interoperable as possible -- and they now check properly for valid input. As for cmod(), no it's not yet deprecated, and personally I don't see a need to do so. If we didn't already have cmod I would oppose adding it -- since abs() does the job -- but since it's extant and documented it seems to me, in effect, a harmless alias. Allin