Failed to Read a Required File

Keywords: BLZAPPAGT02111, 2111
Failed to read a required file. Please close all other applications, temporarily deactivate your antivirus software, and try again.
Error Code: BLZAPPAGT02111

The Blizzard Update Agent could not read a necessary file in order to run or update the game. This happens when a necessary file is corrupted or locked down by another program. Follow these steps to resolve the issue

Windows

  1. Run the repair tool to resolve issues with damaged game files.
  2. Delete the Battle.net Tools folder to clear any corrupted files.
  3. Disable or temporarily uninstall any security programsSecurity software may interfere with the Update Agent
  4. Run the game in Administrator Mode. Our games require administrator privileges to install, update, and run properly.
  5. Try closing background applicationsPrograms running in the background can conflict with the Update Agent. 
  6. Run check disk and defragment your hard drive to resolve any file ssystem or hard drive issues that could cause this error.

Mac

  1. Run the repair tool to resolve issues with damaged game files.
  2. Delete the Battle.net Tools folder to clear any corrupted files.
  3. Reset game folder & file permissions to resolve any permission conflicts.
  4. Run the game in Administrator Mode. Our games require administrator privileges to install, update, and run properly.
  5. Try closing background applications. Programs running in the background can conflict with the Update Agent. 
  6. Run the Repair Disk utility to resolve hard drive issues. The folder may be saved on a corrupt hard drive sector. 

Tried everything here?

If you have tried all of the steps for your operating system and still require assistance, please visit our Technical Support Forum (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) (Heroes of the Storm) or contact us.

Get Help

Still can't find a solution? Submit a ticket and someone will help out!