subregion Toposurface

[nikoue]

I m trying to split a toposurface to subregions. I have a dwg attached and it contains several closed polylines.  when i am in subregion menu i use the pick line tool pressing the tab to pick all the loop. I can pick some loops but not all. I cant see any difference between the closed polylines. why i cant pick all the loops? Is there another way to pick a lot of segments at one. Manually is very difficult . All the polys have a lot of segments

[constantin.stroescu]

Difficult problem. Toposurface has yet to be worked...

I think you have to check first the dwg file in Autocad.

As I know only Lines, Polylines 2d and 3d from Autocad can be used in Revit for Pick Lines operation.

I think also that if using Autocad to put entities on diferent layers and then in Revit to filter the layers ( Visibility /Graphich Overrides > Imported Categories > swith on -of the layers) can be helpful when someone has a lot of lines on background.....

[nikoue]

the pick lines work. What doesnot work is the press tab to pick  a loop af continious lines. It work in some cases but not all times.