I am working with a scan .stl file (Surface scan) and try to convert in to model using Scanto3D tool (2011). The problems I am facing: I could not able to see the measurements and the mass properties got disabled. My intention is to compute the volume of the scan object. I understood that we need to make a watertight model. I am not a profesional of Solidworks. Please suggest what could be the reasons that mass properties do not appearing. The same I can see when I open same .stl in Meshlab.