It seems that after about every 40 or 50 CCD/patient summary documents I send to print (I print one after each encounter, in accordance with MU requirement), AC tells me that it cannot print the CCD(" CCD cannot be printed as it may be unreadable"), and after that, I cannot view any pdf file in imported items unless I shut down and restart AC. It has happened with both Adobe reader as well as Foxit reader. My ability to read PDF files outside of AC is unaffected. Is this a problem of memory consumption, or does anyone have any particular thoughts as to what might be causing it???