We had no problem doing this a long time ago but since a while it's not working anymore. When we have a dado, and we put a diameter tool , let's say 0.25\" for a dado of 0.4 width, it says that it can't find a tool for an operation.......etc.. so we have to do it with a combination of centerline
Are you having this issue with dxf or twd file types? If you could send me a copy of the files to program@thermwood.com, I will certainly take a look at the situation.