Adobe digital Edition 2.0 when i open the XXXXX.epub file view cannot be displayed once i colsed and open the same file(XXXXX.epub) on ADE 2.0 means
the file is alreday exist in library and also open the other epub files means same error occurs....
I hadn't come across this bug on ADE2.0, but it has lots of bugs so try 1.7.2.
There are lots of bugs in ADE2.0. Try replacing ADE2.0 with the older but more reliable v1.7.2.
(You can have them both installed at once if you like.)
Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.
The forum software is sometimes corrupting the link above. There shouldn't be a blank in 'editio ns.html'. The following redirects to the same page: http://tinyurl.com/diged172