Prime 2.0 Odesolve issue

Hello folks,

I tried the Prime 2 sheet labelled "free-fall.xmcd" in order to familiarize myself with the ODE.

I ran into a problem when changing the guess value's unit from imperial (ft) to metric (m). Prime doesn't compute telling me that the units are not compatible (see attached worksheet).

Until now I supposed this to be the raison d'etre of MathCad that it converts units automatically. Am I missing here something?

Raiko

P.S.

Changing all guess value's units to metric didn't help either.