nodes may have incorrect normal definitions

[yanger11]

I am getting this warning, "nodes may have incorrect normal definitions" and I do not understand how to fix it. From the manual, it suggests that it has something to do with how I define my contact surfaces but I do not understand how to redefine my contact surface to fix the error

 

[corus]

If the conract surfaces are shells then you're asked to choose which surface is the contact surface by a coloured arrow. Make sure you haev the right one. If it's on a solid surface then you may have problems swith nodes where an edge exists within the contact surface region.

corus