Thank You Xorimuth - you are always a wealth of great info.
I do think I'd better upgrade to 4.2.1 soon though, I think the 00 is causing problems with people being able to join a multiplayer game.

I realized at 4.1.9 that I probably shouldn't go to 4.1.10, since in my mind 4.1.10 is equal to 4.1.1. SO I went to 4.2.00, with plans to use 00-99, which now seems to be blocking players from joining and reports a version mismatch, even though the portal has 4.2.00, and the players have my 4.2.00 m...

Error: Failed to upload mod: Unknown error. (code: 500)
Same error - please advise:

Thanks, I turned this off (false setting), and the delays all disappeared. Previously changing maps took ten minutes, are now less than a second. Also this impacted playing Factorio, just putting down a steel box would cause a few second delay, and when research completed, causing a change to the Wa...

Did you enable "log-stack-trace-on-non-critical-exception" in the config file? Yes - it was on for the saved config. log-stack-trace-on-non-critical-exception=true so this is likely why it's so slow - it's saving a stack trace with every non critical exception - I'll disable and test more.

I'm playing Warptorio2, with some QOL mods, and end of level and loading the game are very slow. In the log file I see this many times: c:\program files (x86)\microsoft visual studio\2017\buildtools\vc\tools\msvc\14.15.26726\include\thr\xthread (230): std::_LaunchPad<std::unique_ptr<std::tuple<void ...

I started a Wave Defense with 1.1.19 and continued playing through 1.1.20 passed day 180. This issue persists, but I notice changes to how it manifests itself. Previous version would group biters and the group would get huge. This version releases groups to form a column and attack main base at freq...

Great thanks for the replys. I've played for 1500 hours and have never noticed that button.

What ? When joining a multiplayer game, Factorio will restart and sync the mods of that game. But when I switch back to a single player or multiplayer game I previously played with mods, I'd like it to sync to that game. Why ? It takes a while of constantly restarting the game to get the right mods...

I have over a dozen mods loaded, all updated to the latest version. Running Factorio 1.X latest which shows installed content release date: Dec 14, 2020 at 2:59 pm. Game crashes about once an hour after having played this map for over 5 hours. Frequency is increasing and this latest crash crashed wi...