Log file

Log files store details about the run of Factorio and contain information that help when solving bugs. Log files exist from version 0.10.0.

Log File Location

Factorio keeps log files in the Application Directory, that is next to the saves and mods directories.

The file you need most of the time is factorio-current.log. Backup copy of the log file from previous run is in factorio-previous.log.

Bug Reporting

Log files are important for finding crashes, especially ones related to automatic updates and graphic settings. Please attach the current log file to all crash reports.

How to post bug report on the forum

use the [code] bbcode tag, or if it is long then use also [spoiler] tag. Example bbcode:

[spoiler=log file][code]
353957.462433  Info Logger.cpp:148: 2015:01:14 10:44:20; Factorio 0.11.12 (Build 13084, linux64)
353957.642242  Info ModManager.cpp:204: Loading mod core 0.0.0 (data.lua)
353957.688258  Info ModManager.cpp:204: Loading mod base 0.11.12 (data.lua)
353958.522936  Info ModManager.cpp:204: Loading mod Belts+ 0.1.0 (data.lua)
353959.314368  Info ModManager.cpp:204: Loading mod Force Fields 1.0.0 (data.lua)
353960.008032  Info ModManager.cpp:204: Loading mod Robo-Charge 0.3.2 (data.lua)
353960.844953  Info ModManager.cpp:204: Loading mod Treefarm-Mod 1.2.4 (data.lua)
353961.587995  Info ModManager.cpp:204: Loading mod UraniumPower 0.3.0 (data.lua)
353962.365319  Info ModManager.cpp:204: Loading mod Yuoki 0.2.20 (data.lua)
353963.513723  Info ModManager.cpp:204: Loading mod base 0.11.12 (data-updates.lua)
353974.654409  Info AtlasSystem.cpp:152: Initial atlas bitmap size is 8192
353974.718934  Info AtlasSystem.cpp:91: Created atlas bitmap 8192x8182
353974.722727  Info AtlasSystem.cpp:91: Created atlas bitmap 8192x6347
354011.404610  Notice Scenario.cpp:126: Loading map /home/cube/development/factorio/Factorio/saves/x1.zip
354011.443453  Info Scenario.cpp:160: Map version 0.11.10-0
354011.457256  Info PrototypeMigrationList.cpp:82: Activating migration Treefarm-Mod/100.json
354011.457406  Info PrototypeMigrationList.cpp:82: Activating migration Treefarm-Mod/110.json
354011.596778  Notice MigrationList.cpp:65: Applying migration: Robot Charging Station: RoboCharge.lua
354011.610766  Notice MigrationList.cpp:65: Applying migration: Yuoki Industries: Yuoki_0.2.6.lua
354015.703084  Info LocaleProvider.cpp:114: Using locale files from the pre 0.11.0 structure (__Treefarm-Mod__/script-locale/en.cfg)
354019.170917  Info GlobalContext.cpp:470: Goodbye
[/code][/spoiler]

Privacy

Log files (in 0.10.5 and later) contain date and time of your Factorio session, your updater login name and full paths for some files belonging to Factorio or mods. Before 0.10.5 the log also could contain your updater token (not a password :-) ) as a part of update request URLs.