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cityofathensohio
cityofathensohio
Participant
June 12, 2019
Question

Error code 0:521

  • June 12, 2019
  • 3 replies
  • 36524 views

Hi,

I have a user that gets this error every day when she tries to open up a PDF. It is only the first time she tries, and she has to close out reader, and open it back up. Then it functions normally. I have tried cleanly removing all traces of reader from her machine and re-installing, as well as ensuring that it is set as the default PDF handler without an issue. This is on a Windows 10 machine.

The full error is: There is a problem with Adobe Acrobat/Reader. If it is running, please exit and try again (0:521)

Any help appreciated.

      This topic has been closed for replies.

      3 replies

      A
      Aziz Ur15D5
      Participant
      January 13, 2021

      Issue Resolved, Thanks

      A
      adeel karim5FFC
      Participant
      October 1, 2021

      Hi Aziz,

       

      Could you please share how this issue is resolved for you?

       

      I am using Acrobat Reader DC Update 2100720091 and getting the same error 0:521.

       

      Thanks,

      Adeel Khan

      Meenakshi Negi
      Community Manager
      Meenakshi NegiCommunity Manager
      Community Manager
      October 1, 2021

      Hi Adeel,

       

      Please refer to the information provided on your another post on community: https://community.adobe.com/t5/acrobat-reader-discussions/build-2100720091-there-is-a-problem-with-adobe-acrobat-reader-0-521/td-p/12416916.

       

      Thanks,

      Meenakshi

      cityofathensohio
      cityofathensohioAuthor
      Participant
      June 18, 2019

      Still an issue...

      AkanchhaS8194121
      AkanchhaS8194121
      Legend
      August 2, 2019

      Hi Lukash,

      We apologize for the delay in response to your query. Are you still experiencing the same error or managed to find the solution?

      If you are still looking for the resolution, then you may try the following troubleshooting steps-

      1- Acrobat and Reader official update (19.012.20035)  is available. This update will be automatically pushed to all existing installations of Acrobat and Reader. If you want, you may also manually trigger the update early by opening the application and going to Help > Check for Updates or install manually: DC Release Notes — Release Notes for Acrobat DC Products

      2- Open Task manager>Close Acrobat/Reader processes running at the background>Reboot system>Restart Reader.

      3- Try this workaround and let us know if this helps-

      Navigate to Reader>Edit>Preferences>Security (Enhanced)>disable "Protected Mode at Startup" and "Enhanced Security">OK>Reboot Reader

      Note: Changing the above security settings could pose security risks. We suggest you to turn it back On once you are done with testing.

      Thanks,

      Akanchha

      j85588139
      j85588139
      Participant
      August 9, 2019

      Akki_24,

      I am experiencing the same problem Lukash is when viewing pdf's with Acrobat Reader DC.  I know who many others who are experiencing it as well.  We are all running the latest update (19.012.20035).  The workaround you provided works but this is not an acceptable solution since we do not want to expose ourselves to security risks.  Is Adobe working on a resolution to this problem?  I have tested other Reader versions (older ones such as XI, 9, etc.) and none of them have this issue.

      Also, I have Adobe Acrobat DC Pro as well.  If I uninstall Reader DC and allow the Pro version to work as my pdf reader plugin I never experience this problem.  The issue is unique to Reader DC only and it is causing many users much frustration.  By the way, in case this helps we are all using the latest version of IE 11 and Reader DC is the plugin.

      Thanks,

      JP

      cityofathensohio
      cityofathensohioAuthor
      Participant
      June 14, 2019

      I accidentally marked this thread as answered. It is not, unfortunately. Still open to any suggestions

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