HOW TO RESOLVE BB App Error 523

How to flash/ repair App Error 523 Reset

             1.  Download and Install Blackberry Desktop Manager Software.

             Download link :-

              http://us.blackberry.com/apps-software/desktop/

            2. Download and install a Blackberry Device Software.

Download from here:

http://us.blackberry.com/support/downloads/download_sites.jsp

                 3.Install Blackberry Device Software Software.
         Go to

     C:\Program Files\Common Files\Research In Motion\AppLoader

And delete vendor.xml  file.

Please note: This file vendor.xml generate when new data package install (Blackberry Device Software).

     4. Open Loader.exe (For Vista/7 please Run as Administrator).

              5. Connect your BB device to usb port.

                  6. Select as per your requirement

 7.For working phone upgradation select first option.

Automatically back up device. 

 8. For App Error 523 Reset Error, select second option.

Do not automatically backup device.

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