Holes Closing Up In Flex

I have a part that is to be cut from thin material then has apattern etched on both sides and some through holes added and thenrolled to form a curve. When modelling the part, I've modelled itflat, added pattern and holes and then used the flex feature. Itworked as I expected except some of my holes closed up after addingthe flex. Also I get some strange results when doing a drawing ofthe part. I've added some screenshots. If anyone has somesuggestions it would be greatly appreciated.

ThanksSolidworksGeneral