... updates installed.
It is not purely my system causing the connection issue, since I am able to read the server list JSON in my browser (at multiplayer.factorio.com).
I attached the log file and a screenshot of the error message.
There are several suggestions for this (or a very similar) issue ...
Search found 18206 matches: multiplayer
Searched query: +multiplayer
- Fri Feb 13, 2026 2:52 pm
- Forum: Technical Help
- Topic: [2.0.73] Multiplayer game list fails to load, shows JSON parsing error 520 instead
- Replies: 0
- Views: 34
- Fri Feb 13, 2026 2:43 pm
- Forum: Modding interface requests
- Topic: Read-only access to files inside active mods
- Replies: 6
- Views: 149
Re: Read-only access to files inside mods
This isn’t likely to happen since files outside of active mods are not guaranteed to exist on all players computers and as such would cause desyncs if used in multiplayer.
- Wed Feb 11, 2026 4:00 pm
- Forum: Technical Help
- Topic: [2.0.66] In-game update not working
- Replies: 9
- Views: 1284
Re: [2.0.66] In-game update not working
You are playing Factorio: Space Age, but your Factorio.com user account only has Factorio base game ownership recorded. For this reason, the update distribution server does not offer updates to your Factorio: Space Age installation.
Please follow the instructions to retrieve your Factorio: Space ...
- Tue Feb 10, 2026 7:30 pm
- Forum: Technical Help
- Topic: [2.0.73] "Could not establish network communication with server"
- Replies: 3
- Views: 189
[2.0.73] "Could not establish network communication with server"
Hi everyone,
I have a problem with joining a multiplayer game. This concerns the game version 2.0.73, build 84377 expansion win 64.
A couple of days ago, I joined a friend's multiplayer game. At first, I was not able to join, but then I learned that I had to open port 34197 (and choose UDP). That ...
I have a problem with joining a multiplayer game. This concerns the game version 2.0.73, build 84377 expansion win 64.
A couple of days ago, I joined a friend's multiplayer game. At first, I was not able to join, but then I learned that I had to open port 34197 (and choose UDP). That ...
- Tue Feb 10, 2026 1:57 pm
- Forum: Releases
- Topic: Version 2.0.74
- Replies: 2
- Views: 2873
Version 2.0.74
... that cloning resource entities would remove some trees at the destination. (https://forums.factorio.com/132405)
Fixed flying text spam when a multiplayer peer was obstructed from building an underground belt. (https://forums.factorio.com/132373)
Fixed that items with rocket launch products didn't ...
Fixed flying text spam when a multiplayer peer was obstructed from building an underground belt. (https://forums.factorio.com/132373)
Fixed that items with rocket launch products didn't ...
- Tue Feb 10, 2026 4:31 am
- Forum: Modding discussion
- Topic: Separate "mods" settings and more (warning, prevents updates)
- Replies: 2
- Views: 423
Re: Separate "mods" settings and more (warning, prevents updates)
... that you pick from when starting the game.
factorio.exe --mod-directory "mods-testing"
I have three different shortcuts to start Factorio: multiplayer, testing, and "normal". If you attempt to start a save with the wrong mods directory, the game will warn you. If you proceed, the save will ...
factorio.exe --mod-directory "mods-testing"
I have three different shortcuts to start Factorio: multiplayer, testing, and "normal". If you attempt to start a save with the wrong mods directory, the game will warn you. If you proceed, the save will ...
- Mon Feb 09, 2026 1:26 pm
- Forum: Technical Help
- Topic: [2.0.66] In-game update not working
- Replies: 9
- Views: 1284
Re: [2.0.66] In-game update not working
You are playing Factorio: Space Age, but your Factorio.com user account only has Factorio base game ownership recorded. For this reason, the update distribution server does not offer updates to your Factorio: Space Age installation.
Please follow the instructions to retrieve your Factorio: Space ...
Please follow the instructions to retrieve your Factorio: Space ...
- Wed Feb 04, 2026 8:16 pm
- Forum: Duplicates
- Topic: [2.0.58] Placement error messages received multiple times in multiplayer
- Replies: 1
- Views: 617
Re: [2.0.58] Placement error messages received multiple times in multiplayer
I believe this will be fixed by 132373
- Wed Feb 04, 2026 12:15 pm
- Forum: Technical Help
- Topic: [2.0.73] Joining MP game causes "Downloading map from other peers failed.""
- Replies: 1
- Views: 298
[2.0.73] Joining MP game causes "Downloading map from other peers failed.""
Hey there,
I have been trying to join a Dedicated Multiplayer Server, after downloading (before loading). I got the message "Downloading map from other peers failed. Please try again.". This is a common problem for me but usually it works on the next try. But this time it doesn't, this problem ...
I have been trying to join a Dedicated Multiplayer Server, after downloading (before loading). I got the message "Downloading map from other peers failed. Please try again.". This is a common problem for me but usually it works on the next try. But this time it doesn't, this problem ...
- Wed Jan 28, 2026 8:01 pm
- Forum: Modding discussion
- Topic: 0.x] Volt Auto Upgrade Lite — automatic upgrade marking on build (WIP)
- Replies: 0
- Views: 225
0.x] Volt Auto Upgrade Lite — automatic upgrade marking on build (WIP)
... it later.
Current Features (Work in Progress)
Auto-upgrade marking on build
works for player-built entities
works for robot-built entities
Multiplayer friendly approach
per-player enable/disable toggle
server controls category settings
No on_tick logic → event-driven and low overhead
Hotkey ...
Current Features (Work in Progress)
Auto-upgrade marking on build
works for player-built entities
works for robot-built entities
Multiplayer friendly approach
per-player enable/disable toggle
server controls category settings
No on_tick logic → event-driven and low overhead
Hotkey ...
- Wed Jan 28, 2026 5:06 pm
- Forum: Outdated/Not implemented
- Topic: Better compression for savegames
- Replies: 18
- Views: 10504
Re: Better compression for savegames
... the size of the file when writing to disk is mostly meaningless (disk speed is never the bottleneck in any modern computer).
You can set the multiplayer compression to be higher, but it still doesn't make a huge difference in save size. There's a finite amount saves can be compressed and with the ...
You can set the multiplayer compression to be higher, but it still doesn't make a huge difference in save size. There's a finite amount saves can be compressed and with the ...
- Wed Jan 28, 2026 11:14 am
- Forum: Outdated/Not implemented
- Topic: Better compression for savegames
- Replies: 18
- Views: 10504
Re: Better compression for savegames
For autosaving I'd say keep current compression level but for multiplayer it would be nice to have higher compression and for manual save maybe max compression?
- Wed Jan 28, 2026 4:37 am
- Forum: Technical Help
- Topic: Switch 2 Factorio stuck on 2.0.72 — unable to load multiplayer save created on PC 2.0.73
- Replies: 1
- Views: 314
Re: Switch 2 Factorio stuck on 2.0.72 — unable to load multiplayer save created on PC 2.0.73
The switch version is only updated every few months, nintendos verification process alone can already take several weeks. Generally if you want to play cross platform the non console players can either subscribe to the "Console" beta in steam or keep an installation that follows the console version ...
- Wed Jan 28, 2026 4:18 am
- Forum: Technical Help
- Topic: Switch 2 Factorio stuck on 2.0.72 — unable to load multiplayer save created on PC 2.0.73
- Replies: 1
- Views: 314
Switch 2 Factorio stuck on 2.0.72 — unable to load multiplayer save created on PC 2.0.73
Hi Factorio team,
Could you please update Factorio on Nintendo Switch 2 to the same version currently available on PC?
Right now, the Switch 2 build is 2.0.72, while PC is 2.0.73. This small version mismatch has a real impact: my friends who play on PC opened and saved our shared world on 2.0.73 ...
Could you please update Factorio on Nintendo Switch 2 to the same version currently available on PC?
Right now, the Switch 2 build is 2.0.72, while PC is 2.0.73. This small version mismatch has a real impact: my friends who play on PC opened and saved our shared world on 2.0.73 ...
- Mon Jan 26, 2026 7:18 pm
- Forum: General discussion
- Topic: Appreciation for better car snapping
- Replies: 2
- Views: 353
Re: Appreciation for better car snapping
Confirmed this is makes driving on straight "roads" much easier and doesn't interfere with any off grid driving that I've seen.
(Not to mention you can properly drive a car in multiplayer now, an unrelated bonus feature)
Great work for something seemingly so minor
(Not to mention you can properly drive a car in multiplayer now, an unrelated bonus feature)
Great work for something seemingly so minor
- Sun Jan 25, 2026 4:10 pm
- Forum: Ideas and Suggestions
- Topic: Consolidate interrupt & wait condition dropdown
- Replies: 0
- Views: 143
Consolidate interrupt & wait condition dropdown
... satisfied" and "Station is (not) full") should just show at "X" in the dropdown and then have a yes/no toggle once they have been selected. For multiplayer, it might even interesting to turn "Passenger (not) present" into "Passenger count" and make it a comparison like "Item count".
Merge "Empty ...
Merge "Empty ...
- Fri Jan 23, 2026 4:49 pm
- Forum: Technical Help
- Topic: [switch2] “Could not establish network communication with server.”
- Replies: 1
- Views: 280
Re: [switch2] “Could not establish network communication with server.”
Are you really sure it's literally no matter which, even the big dedicated ones ?
Does the ping line says «Cannot reach» ?
It might be because, (from my experience on PC, rather than Switch), since matchmaking through Steam was added as an option, a lot of people do not bother to properly set up ...
Does the ping line says «Cannot reach» ?
It might be because, (from my experience on PC, rather than Switch), since matchmaking through Steam was added as an option, a lot of people do not bother to properly set up ...
- Tue Jan 20, 2026 11:55 pm
- Forum: Ideas and Suggestions
- Topic: Save-file parsing via factorio executable
- Replies: 1
- Views: 223
Re: Save-file parsing via factorio executable
... Savefile name ("Earf").
Then there is a list of Mods (starting with "base") with their Versions and some separators.
Further down you will find the Startup Settings, map generation data, and a lot more...
Multiplayer Servers can access this using RCON + In-Game LUA code, eg active_mods .
Good Luck!
Then there is a list of Mods (starting with "base") with their Versions and some separators.
Further down you will find the Startup Settings, map generation data, and a lot more...
Multiplayer Servers can access this using RCON + In-Game LUA code, eg active_mods .
Good Luck!
- Thu Jan 15, 2026 6:22 pm
- Forum: Ideas and Suggestions
- Topic: Display panel should be unlocked with a separate red science research
- Replies: 0
- Views: 169
Display panel should be unlocked with a separate red science research
... especially in combat oriented maps). An early and cheap way to leave notes for other players would be useful.
2. When inviting friends to play multiplayer to introduce them to factorio. My favorite way to play that is by letting friends work on science automation while only providing tips/hints ...
2. When inviting friends to play multiplayer to introduce them to factorio. My favorite way to play that is by letting friends work on science automation while only providing tips/hints ...
- Sun Jan 11, 2026 5:35 pm
- Forum: 1 / 0 magic
- Topic: [2.0.72] Crash loading save 'Error ElectricEnergySource.cpp:496: Can't transfer'
- Replies: 2
- Views: 282
[2.0.72] Crash loading save 'Error ElectricEnergySource.cpp:496: Can't transfer'
... crash when attempting to load, though older saves in the same world appear to load fine. This crash occurs when loading singleplayer or multiplayer, and I've tried various combinations of disabling/enabling mods with seemingly no change in behaviour.
I was in the middle of redesigning how ...
I was in the middle of redesigning how ...