I know there has been a few threads on this, poked through all that I could find and followed all the advice I could find, however I am still having some trouble. I have tried using all the Spells > Batch options, Spells > Optimize, and just about every combination of those options you could come up with. Also tried going into NiTriShapeData and changing Vector Flags to Has_Tangents. I'm converting an armor mod to SE, and I have UNP/UNP BBP working no problem. But trying to port the CBBE TBBP meshes, and 7B Bombshell meshes are giving me quite the trouble. Always results in CTD when equiping the armor. Here is a rar file with 2 nifs, one from each, so you can view it in Nifskope and see it yourself, maybe you can spot something I'm missing. https://dl.dropboxusercontent.com/u/29757273/Nifs.rar