I retried this today and found a working solution for me.
make a lisp file with only this code in it.
Code:
(progn
(sd-uwgm-element-load (sd-uwgm-element-exists "number.mi"))
)
Do not put anything else in it and open the lisp file in Modeling. Then it works fine. Very strange.
Do not put this between other code or it will not work.