hexagon logo

Adams Machinery/Gears

Hello,
 
When modelling a planetary gear system throught the gears machinery module, I hot an error message of massless, non-manifold solids. I assume this was referring to the carrier created by the module. I am also having trouble understanding how the carrier and planets are supposed to be defined. So far:
 
I have the sun fixed on its shaft (solid body)
The ring gear fixed on a gearbox (solid body)
The planetes as rotational and
The carrier as fixed to a shaft (solid body whose geometry is the same as an acutal carrier's minus the rods/shafts on which the planets are mounted)
 
What is the proper way to set up the planetary gear system?
Also, while I assume that the massless parts was referring to the carrier, I still need to ask, are the gear masses automatically calculated?
 
Thanks,
 
Josef