"there are 4 drill size 3.0 mm that are missing solder mask opening ,see the picture .we kindly propose you could update the gerber file ."
I used the 1PIN module in the pcb design tool to add these holes.
I haven't had problems with "1pin" before. Did you check the gerber files with a gerber viewer? (gerbv is quite good). Can you post them, or at least the 'picture'?