Hi Pilou,

> Ok but as the same function has the htm companion in the V3 I was perplex! :)

I see - so for this command if you preselect the curve then when you trigger the command it will find that curve and be able to immediately do its action. It does not need to show any UI in that case so the missing UI doesn't matter.

If it can't find the curve then it will prompt you to select curves. That second one with the selection prompt won't work properly without the .htm file.

- Michael