DCP to Smooth (closed) spline where Mesh/Turbosmooth gives you crap. Of course, it doesn't just work on splines, if you put an Extrude on the spline first, then add the DCP..it will still work
installation:
01) download my DataChannelPreset
02) put it in: C:\Users\xxx\AppData\Local\Autodesk\3dsMax\2017 - 64bit\ENU\en-US\plugcfg\DataChannelPresets
then follow video.