problem in creating vol mesh
 

hi friends,
am working on with the external aerodynamics of an aircraft and i had already created a good quality surface mesh. I had also created the layers. Up to that there is no problem. But when i define the volume some errors are coming like duplicte, hanging elements and intersection. Plz help me to rectify these errors. I had not used the size box.
Thank you

errors in volume boundary definition
 

hello all,
i am meshing a 3d wing when i select mesh volume tetra rapid i am getting errors in volume boundary definition, then a check manager opens up showing intersection of pid, please help out.