Dark Age of Camelot Wiki
I receive a message with the error ‘cannot write to debug.log’ and then the game crashes.

To resolve this, please delete your log files.  You can find them in your My Documents folder under the Electronic Arts/Dark Age of Camelot subdirectory.  Be sure to remove the following files:

animnode.log debug.log critical.log ui.log world.log

Once the files are deleted, please try logging into the game.  The error message should be resolved.

If that doesn't work, please contact Technical Support by filling out a support request form at [1]