Hi Martin, no problem - I'm still not entirely sure what I should do for this kind of case where there is no $INSUNITS value set inside the DXF file, I guess the choices are that I could take it as "No unit system" which is what happens currently or the other choice is that I could pop up an additional dialog box that asks you what the units are and relies on you to happen to know the answer.

It sounds like this might be a nice improvement to ask for from Ucancam though, to write this particular $INSUNITS header value with the units setting out when they generate a DXF file, so that their DXF output would go into other programs with a units setting intact.

- Michael