Thank you Michael,

Still digesting your posts :-)

The SpurGearProfile is a very old script, by someone else, maybe 2008?
http://kyticka.webzdarma.cz/3d/moi/#SpurGear
(So based upon your posts, my guess is that there is something else causing the error message, not just the first "variable/item...." in the script)

The JacobianFunctionGraph uses code from MoI's TEXT command/factory and in MoI3, displays some text.

-Brian