@tig said:

Assuming you follow the steps correctly as prompted there should be no issues with EEbyRails
There are some rare clashes with other scripts that change base classes - like group - ill-advisedly... These then stop some tools like Mirror, EEbyRails... and 2dBoolean - actually it's more common in v7 than v8
Some culprit scripts are DrivingDimensions[seen with v7 only - so far], SketchyPhysics[some versions] and a few pretty unusual tools I can recall off hand but you are unlikely to have loading...
The scripts that fail are doing nothing wrong - the 'rogue' scripts are messing with the way Sketchup handles groups etc...

Thank you TIG.
I did the same steps in SU8 and SU7. they allow me to select all the elements. The difference is, in SU8 after selecting the melding profile nothing happens, but in SU7 it generates the surface immediately. May I offer you some information to diagnose the issue?
Kind Regards from CHILE!

Hello everybody
The first thing: Thank you very much!. Excellent job!

The second: I have problems when I followed the niche tutorial. When I tried to use Extrude Edges by Rails in SU8, it allow me to select the profile, rails, etc. but nothing happens. I changed to SU7 and the extruded surface came up immediately. This is my second Issue with SU8…
Your help please - I've split the thread off into EEbyRails... TIG http://forums.sketchucation.com/viewtopic.php?p=350962#p350962