Reverse Engineering

I am using rhino plugin “rhino resurf” to create closed NURBS poly-surface. But now I want to create nurbs poly-surface from a large STL file that has size of 63 MB (around 3.5 lac facets), but rhino stops responding when I click create surface. Is there any fast method to do it??

Maybe use ReduceMesh first? Play a bit with the reduction percentage and see if you can get your facet number down without loosing significant resolution.