Edgeloops breaking the mesh

[tortilla1]

Hi,

I’m having problems with edgeloops. Sometimes when I select 4 faces, then click on edgeloop it only connects 3 of the 4 faces…and effectively breaks the mesh (which you see when you move one of the points).
I used it on an imported subdivided cube…problem seems random…sometimes it works sometimes it doesn’t…Is this a bug?

[aurick]

Is this an imported model? Are you sure that all the points are welded?

[tortilla1]

Yes, it’s an imported obj. file from 3dsmax7…
…and yes, all the points are welded (I dubbelchecked by exporting the tool
from ZBrush, and back into max;)

thanks