Call of Duty

Fatal Error Unknown Function Error: How to Fix for Warzone

A new bug in Warzone has left the community perplexed on how to fix the "unknown function" error. | Photo by Activision, Infinity Ward

A new error has been affecting Warzone players everywhere, stating that there is an "unknown function" that's causing a fatal error. With the newest update that just shipped out on Thursday for Warzone, the community is still struggling to find a consistent fix for this error.

Fatal Error Unknown Function Error: How to Fix for Warzone

Currently, Raven Software nor Activision's support accounts on Twitter have offered any help or insight on how to fix the error, which left most of the community perplexed on how to fix it.

Some in the community are suggesting to also try and repair the corrupted game files through the Battle.net launcher if playing on PC.

To scan and repair your Warzone files:

  • Select Call of Duty: Warzone in the Battle.net launcher
  • Select the cog wheel next to the Play button
  • Select Scan and Repair

It will take some time for the game files to be verified and to work after, but this method does have mixed results, with some having to even further by deleting some of the local files within the hard drive and then scanning and repairing those files after.

YouTuber Tech Sites uploaded a video that highlighted some fixes which include scanning and repairing the files, and a more advanced method in order to try and get the game running:

  • Select Call of Duty: Warzone in the Battle.net launcher
  • Select the cog wheel next to the "Play" button
  • Select "Game Settings"
  • Check the "Additional command line arguments" box
  • Input -D3D11 into the text box below it
  • Select "Done"
  • Try to load Warzone to see if it works

If those don't seem to fix the issue, there is the possibility of having to uninstall and reinstall the game, though it does take a considerable amount of time to download all of the files for the game.

So far at the time of writing this story, Activision nor Raven Software have not released a fix for this game-breaking bug, so it may be wise to either wait for a fix officially or through community posts that suggest other methods.

This is far from over on Warzone's long list of in-game bugs or errors that have affected gameplay for players. Though, it's hard to believe that Activision will be slow to respond to this error due to the magnitude of players that are affected by it.