not really, though those kinds of errors usually come in concentrated areas where you may have done some booleans or something. My next suggestion would be to cut the mesh in half (symmetrically) in order to halve the number of problems. Then just start fixing. Area select a vertice and see fi it tells you if there is more than one. If there is, then fix it, if not, then move on. While you're at it, remove needless polygons.
Alternatively, some good advice may be to rebuild the mesh from scratch, using all the new tools you've learned in the construction of the old one. Aeries did this with the Mithra and really came a long way.