About SubDivide in nurbs :)

 From:  Andy (ANDYT)
9689.105 
I have been trawling through the various chats about SubD and importing an OBJ file. (I also have a STL file version)
Trying to import a 3D scanned object file in .OBJ format (with a .png graphics file & a .mtl file) I have tried just importing the.obj file only but it does not work
The 3D scan is not closed, the base of the scanned object did not scan in - could this be the problem ? How could I close this as not a mesh user
I have tried using meshlab to reduce the mesh count but again no luck, or it could be its 3 sided rather than a 4 sided mesh ?
I only need a low res version to build a Nurbes version from, effectively tracing over in 3D
Any thoughts or ideas would be most welcome or other routes to import the file
I am not that techy