[C4mil0]

Well, I'm trying to do a mesh and after the "compute" ends, appears a sign that say's "Your geometry has a hole, do you want to repair it?" I'm working on my final undergraduate project, it is a hovercraft, so, I guess that obviously it should has a hole.
So, the options for the sign are: Yes, No or Only shells. Yes: appears yellow, green and red lines arround the bottom of the hovercraft. No: I used the "check messh" and about 8% appears a sign of "diagnostic: uncovered" appears a number and "problem elements were found. You can put them in a new subset 'uncovered faces', fix the problem by covering the exposed faces, or ignore." whatever I do, again appears another and another problem.
So... I'm kind of lost... and I would really appreciate some help