Kubotek Forum

I have a spinneret ( die plate) with 32  3mm die holes drilled in a 10mm thick disc. When I drew it up a year ago, all was fine. Now I open the file and it looks the same except a part of the 3mm hole wall is just missing, you can see right thru. There are about 12 holes like that. Saving and re-saving does not correct it. It appears ok in wireframe mode, just not as a solid.  Hopefully the file is not corrupt and can be repaired. What suggestions would anyone have for me to try?