Skip to content

| Aspect | Rating | |--------|--------| | Fix difficulty | Easy to moderate | | Success rate | ~85% (after file verification/replacement) | | Official patch? | No – community fix only |

Recommendation: Start with verifying game files and running as admin. If that fails, use the community-provided English sound bank file from the Steam guide link above. Avoid random file download sites unless verified by recent comments.

For non-Steam versions (or if verification fails), you may need to manually restore the file.

  • Look for the sound folder, then open en (or english).
  • Find cmnrootenglish.sabs (size ~150-200 MB). If missing or 0 KB, it is corrupt.
  • Obtain a clean version from a trusted friend or a fresh backup. Do not download .dll or .exe files from random websites – only original game assets.
  • Paste the clean file into the sound/en/ folder, overwriting if prompted.
  • Right-click the new file → Properties → uncheck "Read-only" if enabled.
  • Re-run Steam file verification or relaunch the game.

    • Why: Antivirus may quarantine sound bank files causing “failed to load” messages.

    Few things are as frustrating as settling in for a session of Call of Duty: Black Ops 2, only to be immediately kicked back to the desktop by a cryptic error message. One of the most notorious issues plaguing the PC version of the game is the error string:

    "sound bank failed to load cmnrootenglish link"

    This error typically prevents the game from launching entirely, leaving players staring at their desktops wondering if their gaming rig is at fault. Fortunately, this is rarely a hardware issue. It is almost always a file path or configuration error.

    Here is a breakdown of why this happens and how to fix it.

    Why: Mismatches can make the engine search for CMNRootEnglish where it doesn’t exist.