Performing testing is vital to debugging a mod. These errors are almost always printed to the error.log. Non-fatal errors occur when the game encountered invalid data or broken syntax. Typically these errors occur during the loading process or when a specific action is taken in-game. When fatal errors occur, an exception will be printed to the exceptions.log. In general, there are two kinds of errors: fatal and non-fatal.įatal errors occur when the game cannot load a vital piece of data and cannot operate without it present.