Yeess, Thank You !

I commented out that line ...

#pb.update(count)

I was/am testing it on a very small dummy file.

I shall investigate my version(copy) of progressbar.rb

Thanks again

Hello,
The plug-in appears to load properly. However, I get this Ruby Console feedback when I run it.

segment 3 [60 to 90]
segment 2 [30 to 60]
segment 1 [0 to 30]
Error: #<ArgumentError: comparison of Float with nil failed>
(eval):2304:in >' (eval):2304:in update'
C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:230:in colorbyslope' C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:223:in each'
C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:223:in colorbyslope' C:/Program Files/Google/Google SketchUp 8/Plugins/clf_color_by_slope.rb:254 (eval):2304:in call'
(eval):2304

Has anyone encountered this before ? .... any solution or direction to resolve ?
I have checked that faces are faces (not surfaces).
Segment materials appear in the list of materials.
The faces just don't want to color ...

Thank you for your help