Geoometry problem - walls and window holes

[Anonymous]

Hi everyone,

I have a building geometry, imported from Archicad. I work on MAx 2014.

All walls are 0 thickness as I need it to be that way. Perpakura software won't unfold geometry correctly and there will be no windows in the final layout in the end.

In the first picture the problem is shown - if I move a vertex, there is a weird polygon in the back meaning that there’s something wrong and the vertex doesn’t belong to the edge I’ve moved it from.
There’s no back polygons - IF I edit poly and click on the wall to select polygon, there is only one, after deleting it, the wall disappears.

I know I could cut the polygon to support each vertex, but it’s too much work (many of walls like the one here in the whole model).

Is there any quick way to solve this problem? Or a plugin?

I tried exporting from archicad in different file formats but each time I get the same thing.

Thanks in advance.

[Anonymous]

Can't believe that such complicated program for professional work like 3ds MAX cannot handle such a simple geometry. Even importing OBJ with Triangulate option ticked doesn't help.