i got the same error
when i tried to load up some of my models in O-2
i make them in a tool called metaseq
and someone told me
i had to use a tool called anim8or to add a dummy KF-Data
yes your right Key Frame Data
with 3dsmax you can animate your models
and de animation is saved in the 3ds file a KF-Data
so i did and from that time i can load them up in O-2
i believe its freeware but i'm not sure
if you need help to find it you can contact me on
MSN: EH_Frisk@hotmail.com or send an email