@dave r said:
You can make your own working model. Get rid of those hidden grids and try it again. It works fine for me without the grids. You'll have to unlock the one parallel to the red axis before you can delete it.
[attachment=1:2ugannqm]<!-- ia1 -->Screenshot - 6_7_2016 , 5_13_32 PM.png<!-- ia1 -->[/attachment:2ugannqm]
My results
Thank for your help Dave!
But still remain some serious glitches.
Those grids where not selected so why the plugin process them?
Therefore I exported the GCode for a simple cube, the file is attached and opencam gives me the errors reported in the screenshot.
As you can see the decimal number are written with comma insted of point and this is not valid.
I replaced the characters and the model is displayed correctly.
Then I tried to work the model posted here but the program, after have processed it correctly, doesn't show the save dialog and crashes.
At this point I wonder what the correct workflow is to generate GCode with sketchup? I open a thread in "SketchUp for 3D Printing" section but for some reason was moved in "SketchUp Pro & Make Discussions":
http://sketchucation.com/forums/viewtopic.php?f=15%26amp;t=65111%26amp;p=597157#p597157
Can you give me some hints?