For mesh elements:
1. Depending on what the Mesh Audit tool reported, you may need to do one or more of the following:
a. If voids were found, select the mesh and use the Fill Mesh Voids tool to fill in holes in the mesh. If there are still voids left over, use Create Shape to fill in the holes manually.
b. If inconsistent normals were found, select the mesh and use the Change Mesh Normals tool to unite or reverse the normals so that all normals are facing outward from the model.
c. If there are overlapping facets, select the problem facets using the Delete Mesh Facet tool, and deleting the problem facets.
2. Once finished, try to validate the mesh again.
For Solids and Surfaces:
1. If gaps or inconsistent normals were found within the model you will need to perform one or more of the following steps:
a. If gaps were found, use the extrude surface or extrude solid tools to extend the faces or edges of the element to fill the holes.
b. If there are surfaces that form a closed surface element with open ends, like pipes for example, the Convert to Solid tool can be used with the Convert to Smart Surface setting selected to create a solid element and close the open ends to a volume.
c. If inconsistent normals were found, use the Change Surface Normal tool and click the green arrow to reverse the surface normal of that surface.
2. Check the model once more to confirm that errors were repaired.
The Fill Mesh Voids tool can be used to fill any missing facets in a closed mesh element.
The Extrude to Surface tool can be used to fill small gaps between unconnected elements in the file.
The Change Surface Normals tool is helpful to fix inconsistent normals within the model.