What is the problem when SolidWorks gives the message:
Tangent constraints cannot be applied to patch boundaries containing sketches.
I get this message when using the Filled Surface feature.
What is the problem when SolidWorks gives the message:
Tangent constraints cannot be applied to patch boundaries containing sketches.
I get this message when using the Filled Surface feature.
It means you should select the surface edges for the boundary instead of a sketch. When you select a sketch SW doesn't know which surface(s) you want to be tangent to.