Mass properties such as surface area, volume, and the coordinates for the center of gravity (COG) are computed based on the material and density parameters of the material assigned to the solid bodies of the parts and part components. When you import models to Creo, the mass property and validation property values of the source models are automatically compared with the calculated values of the imported models only when material assigned to the source models are imported to Creo and the material definition complete. The imported models can belong to file formats such as CATIA V5, Creo Elements/Direct, JT, NX, SolidWorks, SolidEdge, Autodesk Inventor, or Creo View.

The import validation property values are not computed when the part models or the part components of assemblies are imported to Creo with incomplete material assignment. When the import validation property values are not calculated, the Import Validation Report lists the validation property values as NA.

Material assignments are incomplete when some bodies of the imported part models or the part components are not assigned material or when the material density is not defined even when material is assigned. The Mass Properties dialog box reports the incomplete assignment of materials that includes material not assigned and the missing material density. The Mass Properties dialog box also makes sure that the bodies are assigned material with density or density is added to the existing material of the bodies.