https://forums.autodesk.com/t5/inventor-forum/holes-in-beams/m-p/5581002#M380141 <P>Unless you have saved the beam which might be a Content Center part to a Library folder that you have designated (by default) as a Read-Only in your Project File.</P> Fri, 10 Apr 2015 17:31:59 GMT blair 2015-04-10T17:31:59Z