>It´s embarassingly simple, but I´m puzzled and thought I ask before I try endlessly...
>In addition I´m stubborn too, so I won´t just modernize the routine to circumvent the problem...
>
>In my legacy app core I put records e.g. in
>

>gaMy(1,1)="1"
>gaMy(2,1)="2"
>
>lstMy.RowSource=gaMy
>lstMy.RowSourceType=5 - Array
>

>Actually it can´t get more primitive. I can see the two array elements in the debugger, but only one in the Listbox.
>< arrrggghh >
>G

You need quotes around the array name:

lstMy.RowSource="gaMy"