Hi Nick,

Thanks for the file. I get the same error message when I open your file here!

I'm running Windows 7 Home Premium; don't know if that makes a difference.

- Steve

So obviously its a Cut2d problem then. Why am I not surprised? lulz.

i'm going to install it on my windows7 machine and see if it works (currently on xp). vectric's forum is virtually ignored by the management. i do see that win7 is ok for cut2d though, http://www.vectric.com/WebSite/Vectric/support/support_faq.htm

so since this is not a moi problem, perhaps we should move to email or private message? i'll message you my email address.

edit for inquiring minds> it all works fine on my weak version of win7 'starter' on a dell netbook (thats about as lightweight as you can get!). there is something wrong locally on steves system.

-nick

Anyway, FYI this is what a successful import of the AI looks like in Cut2d. The blue nodes are points and the green nodes are the bezier control handle thingys (2 per point). Looks like it made 32 of them in a 2" dia circle. I tried with a 20" dia circle and it made 60 points (did Moi decide how many points)?

Hi Nick,

> I tried with a 20" dia circle and it made 60 points
> (did Moi decide how many points)?

What happens there is a circle is what is called a "rational" curve (that's what gives the R in NURBS), which means in addition to x,y,z values for control points there is also a weight value for each control point as well. These weight values are what allow a NURBS curve to exactly represent conic sections like a circle or ellipse.

The AI format does not have any ability in it to have weight values, it can only contain "non-rational" bezier curves in it.

So if you have a rational curve, when you export to AI format it will get refit into a non-rational spline using a tolerance based refinement mechanism.

- Michael

Nick and Michael, thanks for looking into this and for the additional info. I'll look into the configuration on my system.

- Steve