Hi, I have opened a Prostructures V8i model in AutoCAD 2010 and did a nwcout so I can read the data in Navisworks 2010 Simulate. However when I try to open the nwc file in Navisworks 2010 Simulate I get a message "unknown version number". Why would this happen after the AutoCAD version is 2010 and the Navis version is 2010?