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# 5 03-08-2003 , 09:26 AM
Kevin
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Posts: n/a
there are not touching

The birail is a very picky thing - also make sure the history is deleted on the curve....also a good guess would be that you have once before made a surface, but deleted and remade..

If this is the case then yes it is VERY fussy - It is almost quicker to make a new curve over the old one and then delete the old one, I have had this problem many times.

But the first thing I would check is that your curves are touching, your curves match points (rebuild curve) and that the curve direction go the same way (curve direction - reverse)