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Failed to lock index buffer in CMeshDX8::LockIndexBuffer

The game crashes and I get the error: 'Failed to lock index buffer in CMeshDX8::LockIndexBuffer'

Paged Pool Memory

The direct cause of this error is not having enough paged pool memory free for the game engine.

Please see the Paged Pool Memory Exhaustion topic for more information.


Do Not Alt-Tab While In-game

The 'Failed to lock index buffer' error may also occur when you Alt+Tab to switch between windows while playing a game and your machine is unable to allocate sufficient memory to render graphics when you switch back to your game window.

The best solution for this behavior is to properly exit the game to return to your desktop so you may work with other applications.


ATI Video Card Users

This issue may also be related to an outdated driver for your video card. To address this issue, it is recommended that you uninstall your current Catalyst drivers, then install the latest drivers.

  1. Download the ATI Catalyst Uninstaller
  2. Install the Latest ATI Catalyst Drivers


Problem with Steam?

Contact Steam Support