I posted quite recently about a subdivision error, which I sorted out eventually but now I have another , I have been modelling a car and when I come to duplicate the half to make the main body of the car I have some problems. I duplicate the body over, combine, and merge vertices along the edges but when I come to subdivide I get an error.
I have upped the settings in the Polygon to Subdiv option window, looked for and deleted rogue points and tried to create edge loops. I really am at a loss now, I think that there are still problems in the mesh but can't find them.
The scene file is below so if you guys could have a look and give me any advice it would be great.