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c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\surface\surface.cpp (1687): Surface::changeMapGenSettings
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\script\luasurface.cpp (2395): LuaSurface::luaWriteMapGenSettings
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\script\luasurface.cpp (643): LuaSurface::luaNewIndex
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\script\luabinder.hpp (348): LuaBinder<LuaRandomGenerator>::callWrapperOnObject
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\ldo.c (350): luaD_precall
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\ldo.c (423): luaD_call
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\lvm.c (104): callTM
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\lvm.c (168): luaV_settable
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\lvm.c (604): luaV_execute
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\lapi.c (1067): f_call
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\ldo.c (137): luaD_rawrunprotected
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\ldo.c (623): luaD_pcall
c:\users\build\appdata\local\temp\factorio-build-pexkpd\libraries\lua\lapi.c (1093): lua_pcallk
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\util\luahelper.cpp (4407): LuaHelper::pCallWithStackTrace
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\script\luagamescript.cpp (1119): LuaGameScript::runEventHandler
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\script\luaeventdispatcher.cpp (687): LuaEventDispatcher::run
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\script\luaeventdispatcher.cpp (513): LuaEventDispatcher::dispatch
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\map\entitymapgenerationtask.cpp (279): EntityMapGenerationTask::apply
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\map\mapgenerationhelper.cpp (92): MapGenerationHelper::applyTaskResult
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\map\mapgenerationmanager.cpp (265): MapGenerationManager::update
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\surface\surface.cpp (1615): Surface::update
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\map\map.cpp (1630): Map::updateEntities
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\game.cpp (210): Game::update
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\scenario\scenario.cpp (1348): Scenario::update
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\scenario\scenario.cpp (1237): Scenario::updateStep
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\mainloop.cpp (1350): MainLoop::gameUpdateStep
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\mainloop.cpp (1203): MainLoop::gameUpdateLoop
c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.16.27023\include\functional (15732480): std::_Func_impl_no_alloc<<lambda_df7262221d3c1f1d60586a46e6ec37ec>,void>::_Do_call
c:\users\build\appdata\local\temp\factorio-build-pexkpd\src\util\workerthread.cpp (73): WorkerThread::loop
c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.16.27023\include\thr\xthread (230): std::_LaunchPad<std::unique_ptr<std::tuple<void (__cdecl SoundLibrary::AsyncLoader::*)(void),SoundLibrary::AsyncLoader *>,std::default_delete<std::tuple<void (__cdecl SoundLibrary::AsyncLoader::*)(void),SoundLibrary::AsyncLoader *> > > >::_Go
c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.16.27023\include\thr\xthread (209): std::_Pad::_Call_func
minkernel\crts\ucrt\src\appcrt\startup\thread.cpp (97): thread_start<unsigned int (__cdecl*)(void *),1>
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 0000000076DD59CD)
0000000076DD59CD (kernel32): (filename not available): BaseThreadInitThunk
ERROR: SymGetLineFromAddr64, GetLastError: 487 (Address: 000000007700B981)
000000007700B981 (ntdll): (filename not available): RtlUserThreadStart
Stack trace logging done
67.040 Error MapGenerationManager.cpp:256: MapGenerationHelper::applyTaskResult(..., force) didn't finish all requests.
67.040 Error CrashHandler.cpp:641: Received 22
Logger::writeStacktrace skipped.
67.040 Error CrashHandler.cpp:195: Map tick at moment of crash: 2486
67.091 Info CrashHandler.cpp:315: Executable CRC: 2419858143

Thanks for the report. Because of how map generation works in order to change map gen settings all existing chunks partially generated have to be finished. That means that changing map gen settings during the chunk generated event is not possible and so the game detects it is happening and aborts.

Mods are not allowed to change map gen settings during the chunk generated event.

I’m open to a better error message if someone can think of one.

I’ve been thinking about this more (because… well as a programmer I like challenges) and I think I could make this work. The question is; how would you as a mod author expect it to work?

If you change the map gen settings in the event would you expect all future events to be using the new settings or would you expect future events to eventually use the new settings?

I feel like having the chunks that are partially generated to finish using the old settings then using the new settings on everything made after that would be expected if it's not possible to have those settings affect the current chunk(s) generating.

Ok, I spent some time today and re-worked map generation to allow this for the next release.

Thanks! Partially generated chunks finishing with old settings works for me.