Evernote V10.3.7 cannot display/open pdf attachments in Evernote for Windows Issues (Versions 10.0 and above) Posted March 18 I am new to this thread and have not read it all. However I have just experienced 'unable to open file' after scanning in from scansnap to 10.9.10 But only larger files! Investigating, I found the attached file did not have pdf extension. I was able to rename it 'in place' with a right-click. Just adding .pdf on the end. I could also then using the ... change default view to 'all pages'. I now see my entire 40-page pdf when I preview or open it. Just what I wanted. Has someone else already said this, in the thread? Don't know.