I have few custom hatches. Some I can open and use, but some I can't. I have error saying "Error in Pattern File". Even if I make a copy of one which is OK (without open it or alternate it in any way), AutoCAD cannot open the copy. In the Customization guide they say all should be OK. I created a .pat file using their example - it didn't work. Of course I used Notepad to do that. What I'm missing?