BuildFacelights:
10%...20%...30%...40%...50%...60%...70%...80%...90 %...Error:
for Face 1356 (texture {farmedge) at
(3072.000 1536.000 512.000) (3071.000 1536.000 512.000) (2848.000 1536.000 512.000) (2848.000 1535.000 512.000) (3008.000 1535.000 512.000) (3071.000 1535.000 512.000) (3072.000 1535.000 512.000)
Error: Bad surface extents (14 x 1426)

Guys how can I fix this , find the face fast etc. :) Im still newish with mapping so sorry if its a stupid question :D

Its probebly your texture alignment that is wrong or that you have scaled you texture up to high. There are no easy way of finding that surface, if the problem doesn't show up in hammers "check for problems" option.

You can see that you have textured it with {farmedge and you have the cordinates listed bellow, all you need to find it is a lot of patience. Click a brush and check its cordinates, move on to the next and se if you if get closer. It can be very frustating... but in the end you will find the problem.

I would have started with trying all surfaces with that texture ...

if you can't eliminate it that way your going to have to select your entire map, algin the textures to world and scale them to 1.0 in x+y its very drastic so i'd suggest trying to find it by check brushes. what may help is replacing thee texture white one that stands out like a pure white. you can replace your old texture back in again when your done.