Boolean Operation Error: Source is not close and manifold
 

Hello everyone,

I am working on a formula f1 car front wing with nose. The file I have imported is in IGS format which I want to split in half and in cooperate it in the block I created. A warning is popping up quoting Source is not close and manifold. I have seen some methods which I tried but failed. can anyone here help me. Can anyone provide me the why is this happening.

go a read about surface repair then do a tutorial on it then repair your surface