Hi Tom,

> Done is somehow generic and unspecific.

Yup, but that's actually intentional so that it can be applied in many different circumstances. Like for instance when MoI is waiting for you to do some kind of object selection you push the "Done" button to signal to MoI that you have finished the selection and are going on to the next stage of the command.

It's kind of helpful for consistency of operation to have a common button that is used for command workflow like that.


I'll see what's involved in making a "Calculation failed" message to be displayed.


- Michael