The process of creating a talking head is normally straightforward and will be the same for any source image you use.
So I can understand the problem a little better, can you tell me if you creating a 3D head or a 2D Head?
Also, can you post a screenshot showing how you have placed the fitting points before the error message appeared? This will help show where you may be going wrong. Thanks.
Peter
Forum Administrator
www.reallusion.com