Hi Fredo6,
Thanks for taking the time to look at the model.
I followed Gaieus' instructions, but I don't get a warning when applying the plugin or saving the file.
Copying the model within the file results in a loss of faces in both sets of geometry. I also tried converting one group of geometry into a component and then applied the plugin. When saving there is a loss of faces for each instance of a component.
What was odd is the fact that when I loaded the component from the component palette it was reproduced at a much smaller scale than the original object. Presumably that isn't supposed to happen and is another indication that there is something odd about the model?
Luckily I have been able to apply the plugin using the method mentioned in my previous post, so I haven't had to remodel the light.
Also I've been working on an architectural model today and haven't had any trouble with the RoundCorner plugin.......so it looks more and more like this was a problem with my model........but can't think what the source of the problem might be.