"Stitching Result Not Valid" Error on Reflected SubD

I am not sure if this is a bug or if I am doing something wrong, but when I try to stitch nodes or edges on a SubD model that is reflected I get the error “stitching result not valid”. I have to remove the reflection in order for stitching to work. I am in Rhino 8 and this issue only started happening today. Even when I open old files with reflected subd’s that never had this issue, they now have this issue. – Is this a bug in Rhino 8 or am I doing something wrong?


Hi Tom - this is indeed a bug and should be fixed in 8.7 - you can get 8.7 by enabling ‘Service release candidate’ in Options > Updates and Statistics page > Update frequency.


That fixed it, thanks!