Gothic 1 startup errors

[SorenTrigg]

So, I have been trying to start Gothic and it loads to the main menu fine and everything, but crashes on the loading screen. I got an error report last time it happened that follows;

001B:7394F566 (0x01FBA8C0 0x73949A8C 0x73949AAC 0x008FE1A8) D3DIM700.DLL001B:7395A9DF (0x076F6DE0 0x01FBA8C0 0x00000000 0x0087CF90) D3DIM700.DLL
001B:7395A9DF (0x076F6DE0 0x01FBA8C0 0x00000000 0x0087CF90) D3DIM700.DLL
001B:00741226 (0x04990034 0x067D0034 0x00000000 0x0A93C31A) GOTHIC.EXE, zCVertexBuffer_D3D::Optimize()+38 byte(s), D:\dev\Gothic\current_work\ZenGin\_Kurt\zRndD3D_Ve rtexbuffer.cpp, line 310+20 byte(s)
001B:005E4017 (0x007F66DC 0x04996274 0x04990034 0x00000002) GOTHIC.EXE, zCVertexBufferManager::UnlockOpenVertexBuffers()+2 63 byte(s), D:\dev\Gothic\current_work\ZenGin\_Dieter\zVertexB uffer.cpp, line 387
001B:0060C320 (0x00000001 0x00000000 0x007F66DC 0x0160FB78) GOTHIC.EXE, zCWorld::LoadWorld()+352 byte(s), D:\dev\Gothic\current_work\ZenGin\_Dieter\zWorld.c pp, line 2351
001B:006F470B (0x0160FB78 0x00000000 0x0160FC34 0x0BD52984) GOTHIC.EXE, oCWorld::LoadWorld()+731 byte(s), D:\dev\Gothic\current_work\gothic\_Ulf\oWorld.cpp, line 447+20 byte(s)
001B:006561C5 (0x0160FB78 0x0160FBA8 0xFFFFFFFE 0x0160FBA4) GOTHIC.EXE, oCGame::LoadWorldStartup()+277 byte(s), D:\dev\Gothic\current_work\gothic\_Ulf\oGame.cpp, line 2935+65 byte(s)
001B:00655505 (0xFFFFFFFE 0x0160FC30 0x0160FCEC 0x00000011) GOTHIC.EXE, oCGame::LoadWorld()+421 byte(s), D:\dev\Gothic\current_work\gothic\_Ulf\oGame.cpp, line 2680001B:00652D44 (0xFFFFFFFE 0x0160FC30 0x00000000 0x0160FCA4) GOTHIC.EXE, oCGame::LoadGame()+260 byte(s), D:\dev\Gothic\current_work\gothic\_Ulf\oGame.cpp, line 2017
001B:00652D44 (0xFFFFFFFE 0x0160FC30 0x00000000 0x0160FCA4) GOTHIC.EXE, oCGame::LoadGame()+260 byte(s), D:\dev\Gothic\current_work\gothic\_Ulf\oGame.cpp, line 2017
001B:0042A890 (0x00000000 0x000623EC 0x000623EB 0x0160FEBC) GOTHIC.EXE, CGameManager::Menu()+2528 byte(s), D:\dev\Gothic\current_work\gothic\_Bert\oGameManag er.cpp, line 1439+331 byte(s)
001B:004271F8 (0x007F7038 0x0006D518 0x000B0266 0x0BD52984) GOTHIC.EXE, CGameManager::Run()+1064 byte(s), D:\dev\Gothic\current_work\gothic\_Bert\oGameManag er.cpp, line 679
001B:006F627B (0x6B636F4C 0x544F475F 0x00434948 0x01E200B0) GOTHIC.EXE, MainProg()+75 byte(s), D:\dev\Gothic\current_work\gothic\_Ulf\Phoenix.cpp , line 115
001B:00500533 (0x000C019D 0x00000000 0x00000000 0x00000000) GOTHIC.EXE, HandledWinMain()+963 byte(s), D:\dev\Gothic\current_work\ZenGin\_Carsten\zWin32. cpp, line 772

Edit: I was also getting 'access violations'. It seems that disabling the Steam overlay fixes everything. So, if anyone has this kind of problem, try that.