10 Replies Latest reply on Nov 3, 2017 6:35 AM by michelo75147693



      Hi there,


      i downloaded an ebook and want to add it to my adobe digital edition library to transfer it to my ebook reader. But when i try to add it, this message comes up:

      "Fehler beim Abrufen der Lizenz; Lizenzserver-Kommunikationsfehler: E_IO_CANNOT_OPEN"  (i guess in english it's "licence-server communicationerror" or something like that xD)

      I already deinstalled and installed the adobe digital edition anew but the error message is still there. Hope you can help me

        • 1. Re: Error E_IO_CANNOT_OPEN
          arwolff Level 1

          I got the same error.  Check your ebook reader.  I bet you are at capacity.  Remove/archive some books to make room and you should be good to go.

          • 2. Re: Error E_IO_CANNOT_OPEN

            I've got the same problems. It's decidetly not the capacity, my ebook reader ist empty and the error occurs when downloading onto the computer...

            • 3. Re: Error E_IO_CANNOT_OPEN
              shreya Adobe Employee

              Please try re-downloading the book.



              • 4. Re: Error E_IO_CANNOT_OPEN
                thomash91905405 Level 1

                Found the root cause:

                • Digital Editions attempts to download ebook to temporary file
                • Temporary file (in %TEMP%\Digital Editions) cannot be created because of permissions [1]
                • Digital Editions errors out with a not very helpful "E_IO_CANNOT_OPEN" result



                - Reset the NTFS permission of the Temp folder and below to include your user, for example with this approach (using %TEMP% as folder name, e.g.,

                takeown /f "%TEMP%" /r

                icacls "%TEMP%" /reset /T



                [1] The permissions for the entire Temp folder have been changed by some program, removing the user from the permission list. This may be an Adobe problem itself, as explained in this post, but has not yet been verified. Resetting the permissions makes Digital Editions work as expected, until the permissions are changed back again.

                • 5. Re: Error E_IO_CANNOT_OPEN

                  OMG!!!!!!!!!!!!!AFTER HALF A YEAR OF NOT BEING ABLE TO DOWNLOAD BOOKS!!!!!!!!!!!!!! THANKS A LOT!!!!!!!!!

                  • 6. Re: Error E_IO_CANNOT_OPEN


                    I've just installed ADE 4.5 but get this error message when I try to open it (ADE)  "Unexpected error

                                                                                                                                            Unexpected error occurs:

                                                                                                                                             E_IO_CANNOT OPEN"

                    Is this a permission error too? I've just had  Windows 10 installed (by Microsoft) and have had a host of permission problems. I think the issue is that Microsoft did an overlay of 10 on Windows 7 instead of completely uninstalling Windows 7.

                    • 7. Re: Error E_IO_CANNOT_OPEN

                      I'm really glad there is a solution to this problem since it seems to much like the common cold (no cure!)

                      However, I'm not that tech savy and when you say:


                      - Reset the NTFS permission of the Temp folder and below to include your user, ....


                      I have no idea how to do this.


                      Would someone please give me some for Dummies level instructions on how to do this?

                      It would be so much appreciated!!

                      • 8. Re: Error E_IO_CANNOT_OPEN

                        You are awesome!  This worked.  Just typed run from my 'windows square' typed in your commands (including the quotation marks) and next thing I new my Adobe Digital Editions Software was working again.  (I hate Adobe Digital Editions...won't ever buy another book on that software as it SUCKS, but at least I can read to one book I made the mistake of buying on that software).  Thanks so very much!!!!!

                        • 9. Re: Error E_IO_CANNOT_OPEN

                          Just get a refund from google books.

                          • 10. Re: Error E_IO_CANNOT_OPEN

                            Thanks a lot for the idea to check the properties of the temp folder : I just had to cancel its "read only" property. (The two suggested commands had no visible effect and led to the same error message).