Double edges

[olivier jeannel]

Hello list, I have a city generated by Cityengine (exported as obj), and some of the houses are exported with double edges. 2 houses exported on top of each other(now merged because the exported meshe was fully polygon disconnected). I'm looking for a simple way to remove the double polygons. I tried the classic filter edges/poly/vertex, but with no luck. Any idea ? Ice maybe ? Thanks :)