It does, but then I get the error message, see the video......

Dropbox

(www.dropbox.com)

This is a videao of what I am doing, maybe that helps....

Sorry for being ignorant but I do not understand what you mean by being in the group?

I have created a group with only the contour lines in it. How do I selct that group without being in it?

Dear Fredo, I have been trying for 2 days now to get Toposhaper to work in Sketchup and keep getting the the same error messsage "cannot hide layer that is a part of the active path". You have said a few times in various forums that you have to use Toposhaper from outside the group not inside, but I do not understand what you exactly mean with this.

I import contour lines from autocad cilvil 3d to sketchup as a dwg file. (these contour work fine in Sandbox). I then put the contours in a seperate group. Then I select the contours in that group and start Toposhaper, it then works for a while and then I get the mentioned error message.

Toposhaper has worked on 2-3 occissions, but it never was clear to me why it worked in tose cases. I could never replicate it afterwards.