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This page lists common technical problems like crashes and error messages (enclosed in quotation marks) and possible solutions or explanations. For general questions, refer to FAQ.
For information on how to report bugs, read Reporting bugs.
Graphics and sound
The screen is too dark
If you feel the screen is too dark, you can adjust the display gamma to a more comfortable value. By default, it is set to 1.8 out of the possible choices between 3.0 and 1.0, with lower numbers being brighter.
To change the display gamma, open your minetest.conf and add the line
display_gamma = 1.0
If 1.0 is too bright, try replacing the 0 with another number below 8 to further tweak the brightness.
If the screen still appears too dark, there currently is no other easy solution apart from changing your display settings. If nothing else works and you still wish to increase the brightness, you will have to edit a text file. This only works with shaders enabled. Open
(Minetest directory)/client/shaders/nodes_shader/opengl_vertex.glsl with a text editor, go to line 80 and exchange this line:
vec4 base = texture2D(baseTexture, uv).rgba;
vec4 base = texture2D(baseTexture, uv).rgba;
float factor = 1.2; color.r *= factor; color.g *= factor; color.b *= factor;
You can try other values instead of 1.2, the higher the brighter.
Everything in the game is in a weird color (particularly red), looks like rainbows, can partially see through things
Turn off shaders. Shaders are not supported by your graphics card.
There is no sound under Windows
You need to download OpenAL to play sound on Windows (the file needed is , you need to execute the program after it has finished downloading. Firefox and Chrome users may need to either save file or keep downloading, Internet Explorer users will need to just press run. Other browsers maybe the same or different. If one browser fails, try another.)
Error messages without crashes
“Unsupported texture format”
Don’t worry, this is completely normal. Minetest will still work.
“Generating dummy image for […].png”
This means that a faulty mod or texture pack does not supply an image for an object. Minetest will still work normally, but the specified object will use a replacement image (the “dummy image”); it will be a random color. This should normally be reported to the author of the mod or texture pack.
"ERROR: No world name given or no game selected" in create world
- You need to select a game name in the list box in the create world dialog.
- Please before the click of the "New" (to create new world), select the icon at the bottom ! (you need choose)
- - Logo minetest ( Minetest Worlds )
- - Cartesian coordinates ( Minimal Development Test - Worlds )
- There may be more icons available if you installed more subgames.
All sub-section titles in double quotes here mean that Minetest crashed with an error message like that.
Any operating system
“Minetest can not load […]/init.lua”
This usually happens when a mod folder is named incorrectly. For instance, mods downloaded from GitHub usually have "-master" added to the folder name, i.e. "modname-master". Simply delete "-master" from the folder name and try again. Also, mod makers may sometimes add version numbers to the name, such as "modname-v2.0". Again, try removing the extra "-v2.0" from the folder name and try again. If you're unsure of the correct name, check the mod's forum page and look at what is in the [ ] in the title. If none of these steps work, there may be a problem with the mod itself. Report the error to the mod owner on the mod's forum page or, if available, the mod's GitHub page by copying and pasting the section in debug.txt that starts with "=====ERROR FROM LUA=====", if any.
“Assertion '0' failed”
This is usually a mod error. Report it to the mod programmer or mod programmers. To find out the name of the mod, look for any error text directly above that gives a path to a mod's init.lua
ERROR: An unhandled exception occurred: LuaError: error: mods/minetest/<modname>/init.lua:69: [...]
“ServerEnvironment::loadMeta(): EnvArgsEnd not found”
This means that env_meta.txt in your world folder got corrupted. Since it doesn't contain any important information you can simply delete the file and let Minetest re-create it.
“MSCP2010.dll is not found” (or similar)
This is because Microsoft C++ Redistribute Package 2010 is not installed. 
Minetest doesn’t even start
If it stops working before the main window even opens, and there are no error messages in debug.txt, then try restarting your computer.
(sometimes it crashes with a
0x00005 error, which is caused by Windows updates.)
You can try looking in debug.txt for an error message or searching for a similar article in the forums.
This is caused by the Direct3D driver. To fix, go to the minetest.conf file and find:
video_driver = direct3d9
change it so that it says:
video_driver = opengl