When using sheetset manager some of my .dwg files are not going into a sheetset. In most cases I can easily pick a folder containing .dwg files and create a sheetset which all files will go into. But in other folders picked to create a sheetset, most of the files in that folder will not go into a sheetset. Some will, most won't. I am new to using Autocad, and would appreciate any help. Thanks