Outstanding work TIG, thanks that was quick, I can confirm it works after the upgrade of the plug-in.

Cheers

Hi Folks

I just installed this plugin into SketchUp 2017. It doesn't work as expected for me. The find CofG still works fine as far as I can tell but the Composit CofG returns a ruby error:

Error; #<TypeError; reference to deleted Group>
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;670;in `entities'
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;670;in `block in do_composite'
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;669;in `each'
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;669;in `do_composite'
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;117;in `initialize'
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;817;in `new'
/Users/hute/Library/Application Support/SketchUp 2017/SketchUp/Plugins/CofGravity.rb;817;in `block in <top (required)>'
SketchUp;1;in `call'

Has anybody got a clue how to fix this? It is really a pretty cool plugin and would be a shame if it became unusable.