Hi everyone,

I am working on a wind turbine blade mold in SolidWorks and I am having trouble getting the block to split into two mold halves using my parting surface. I am getting the error "The body cannot be split by selected tool(s)" and when I try the Intersect command I only get 1 region.

Here is my setup:
- The blade was built using imported airfoil curves from QBlade, lofted into a Boundary Surface
- The blade has a tapered cone tip created with a Surface Loft
- The blade surfaces were knitted together with Create Solid checked to make a solid body
- I used Combine (Subtract) to subtract the blade solid from the block (Boss Extrude)
- I created a manual parting surface using a combination of Ruled Surfaces, Surface Lofts, Fill Surfaces and Parting Surfaces, then knitted them all together
- When I run Split using the parting surface knit as the trim tool and Combine1 as the target body, I only get 1 resulting body

I believe the issue is related to the tapered cone tip I added to the blade. The original blade had a flat tip and the process worked before. The cone tip creates a sharp converging point at the end of the blade and I think this is causing the parting surface to be incomplete or non-manifold in that area.

My questions are:
1. Has anyone dealt with a parting surface that fails specifically because of a pointed or tapered tip geometry?
2. Is there a way to patch or fix the parting surface around the tip area without rebuilding everything?
3. Would it be better to handle the tip as a separate mold insert rather than including it in the main parting surface?

Any advice would be greatly appreciated. Thank you!