Hello I've just started getting an AppCrash error whenever I launch a single-player game, but it didn't happen last night. I've launched alot of games testing my XML alterations, and they've all been fine. I finished my alterations last night, launched a game to test them then switched off. Today I've gone to start playing a game, without making any additional alterations, and I get the AppCrash error. I've had a runtime error aswell, but only once. Problem signature: Problem Event Name: APPCRASH Application Name: Civ4BeyondSword.exe Application Version: 126.96.36.199 Application Timestamp: 4a0c27e6 Fault Module Name: python24.dll Fault Module Version: 2.4.1150.1012 Fault Module Timestamp: 424a51b6 Exception Code: c0000005 Exception Offset: 00080548 OS Version: 6.1.7600.2.0.0.256.1 Locale ID: 2057 Additional Information 1: 8485 Additional Information 2: 84853502223d8164a31468861a7c3d71 Additional Information 3: a4ea Additional Information 4: a4eacf9d27e5ee8cb3a70ac0035eb8ab I've attached two DxDiags. I ran the first one, saved it then noticed an option to run "DxDiag 64-bit", so I did that aswell. I'm still running as administrator, and the UAC is still disabled. Can anyone help? Thanks. EDIT This may have something to do with the "Lock Modified Assets" option in Custom Game. I can get into the game without problems if I don't have it checked, but it fails every time if I do have it checked. Maybe it's caused by all of my alterations.