Which repetition did you specify in the repetition box in go to object?
If I test this with 2 in the repetition box, it works. If I edit the script to use 1, it generates a 102 error as I would expect.
Somehow I missed the repetition designation in the Go to Object step. Setting it to match the field's repetition does make it work. It's a little misleading however. It implies that there could be 2 objects with the same name but different repetitions. I guess the intention is where you have one object and showing both repetitions. Sorry for the bandwidth.
Since you have specified repetition 2 for this field on the layout, shouldn't you also specify repetition 2 in Go To Object? For that object, repetition 1 is not present on the layout, hence the missing field error code.