A lot of the blocks made in 2011 and 2012, some are older but none show up. I have been working with three difference drawing the past year and two of the drawing they work find, all drawings were started from the same drawing blank. I tryed to attach the drawing but it keeps giving me and error.
Great to Know, it started working fine. Its always recommended to upgrade your software to all the latest service packs. Do let me know, if the problem comes back again in AutoCAD.