Several PC and Xbox One players reporting COD MW dev error 6034. COD Modern Warfare dev error 6034 could trigger for various reasons, most likely corrupted or unreadable game data.
Follow the steps below to fix this annoying issue.
This error is related to unreadable and corrupted Call of Duty Modern Warfare and Warzone game data.
With the previous updates, Activision merged map packs. So now when your game is searching for specific maps it’s looking in the wrong place and you eventually gets the dev error 6034.
This issue can be fixed after removing different packs. The last 22GB Multiplayer Pack was supposed to replace some of the other data previously downloaded, and having both installed is leading to Warzone dev error 6034 on Xbox.
Uninstall all the older multiplayer data packs, except the first multiplayer pack (6.0 GB). Also, delete the Warzone Data Pack 1 and Data Pack 2.
Now install the new multiplayer pack (22GB) and the new Spec Ops and Multiplayer combat pack.
This will allow you to access Multiplayer without any error.
Highlight any content you wish to uninstall.
5. Select Uninstall, then select Confirm.
If the above trick 1 worked for you, do not follow this one.
Install the following packs only. Watch the video.
Many players are getting Warzone error code 6034 on Xbox One with the message “you have been disconnected from the call of duty servers”. Call of Duty dev error 6034 in Warzone could trigger for various reasons, most likely network connection related.
Some players are also getting dev error 6034 ww_code_pre_gfx.ff or dev error 6034 eng_code_post_gfx.ff on PC. There are also reports of the following Warzone dev error 6034.
goldflake error warzone
rembrandt error warzone
ww_mp_ hideout ff
dev error 6034 ww_mp_m_speed ff
Change your router DNS with the following
Restart your console:
Make sure your game software is up to date:
Clear your PS4’s cache:
A future Warzone and COD Modern Warfare update will fix dev error 6034 on Xbox One and Xbox Series X.