I am trying to open a STP file which was exported from theoptical design package Zemax. The model is just two lenses withrays. However when I open it I get the message "Assembly filedetected. Import not allowed" and it won't open. I can't find anyinformation on what this error means or how to fix it. Can someoneplease point me in the right direction.

Chris
(Solidworks 2008 SP4)SolidworksGeneral