Sweep doesn't use all of guide rail

[FiInnovations]

Why does my sweep not use the entirety of the guide rail? I have bumped into this a few times. I can make wings in Rhino using 2 rails and one airfoil resulting in a nice surface for minimum input, but Inventor flummoxes me here.
Anyone with knowledge of ASM chip in here?

2020 IPT Attached. I'm aware that is wing is not Geodetic (yet).

[Xun.Zhang · Accepted solution]

Hello @SargeNZ,

This is reasonable since it will result to Self-intersection error.

Please create half and half to complete the design and the surface is continuous as high quality as well.

Video - https://autode.sk/2RzfgVz 

Hope it helps!

[FiInnovations · Accepted solution]

Thanks @Xun.Zhang that is a great help.