I took a look at your sketch. You have multiple upon multiple of doubled lines in your hexagons. The function that you've been pointed to already will find each instance of doubled lines. However, it will only find them one at a time. You'll have to run that function 60 or so times to find all the errors in this sketch. I would start over if I were in your shoes, looking into the "fill pattern" to pattern a single hexagonal hole rather than sketching them all. I assume you're running 2006 as I didn't get an upconversion warning when I opened your file.