Open edges for patch,the results is faile

patch.3dm (560.7 KB)

What are you trying to do?

Use BlendSrf to create a surface which connects the two surfaces.

Thank you! I know this, and I’m trying to make sure it’s not a patch bug.

It’s not a “bug,” Patch is just not a tool you should use for anything like this, it’s not a tool you should be using normally at all. People shouldn’t even be taught it exists, it’s a niche command for 1 or 2 very specific cases.