@Frank_Oostendorp Mine does the same, never really bothered me as it's just a viewer which we can convey the design intent to our colleagues in other parts of the world.

Try saving assembly as 3DXML and then use D.S. 3DXML viewer... it's a free download from Dassault site

Can't see any reason why you can't create the circle you are trying to sketch, but do have a few suggestions which will help you use Catia: 1) Turn off the grid and snap to grid when working in sketcher... I find it much easier to use that way. 2) If you don't want to have irate manufacturing guys, ...

If you can get IT to download 3dxml viewer from DS (free download) then just save part or assembly as 3DXML you can view, rotate, hide show but no measuring.
Just google 3dxml viewer and you will find link to download

I could be clever and say Catia as this will do exactly what you want :) What you can try is: Create COM Then create 3 global variables which you can assign the values in XYZ of COM (make sure you set to automatically rebuild) Create 3 planes paralel to Front, top, Right and link to the 3 global var...

Take a look at Cenit's Fastsuite it's available standalone or as a bolt on to Catia V5. Cenit would be able to customise to suit the tasks being performed with robot if required. Will give you both programming and simulation capability. The downside is that it could be expensive, but it is really go...