Bug Reporting Guidelines

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Where to be

You can find the bugtracker on our GitLab repository. Before you can report a bug, you'll have to register an account. After that, you can log in by going to the the same page and using Sign in form.

After logging in, go to the issues page once more. You can now submit a bug by clicking on "New Issue". Before you do that, be sure to search for duplicates!

Search for duplicates

Before doing anything else, use Search to check if your particular issue has already been reported. Try searching for keywords describing your issue (e.g. "dead npc collision"). If that didn't work, try using Google.



Give a description of the problem, and the circumstances under which it occurs. Prefer a long, descriptive title.

Good: Screen flashes blue when opening a container and selecting "Take All"

Bad: Container issue

Please do not add additional information (e.g. OpenMW version) to the subject. This will only make it harder for us to browse the issue list. Instead, add it to the Description field.

Note: If your bug is related to the OpenMW editor, OpenMW-CS, append "Editor: " to the beginning of your subject string. Do not amend the subject of existing bugs that may have the prefix, "OpenMW-CS: ".


Describe the issue as detailed as you can. Below is a list of questions that should be answered in the description (if they apply).

  • Is the problem OpenMW specific or does it also happen in vanilla Morrowind?
  • What version of OpenMW are you using? If you used a bleeding edge build, state the exact revision used.
  • What version of Morrowind are you using (i.e. retail CD or Steam)? What addons (Tribunal, Bloodmoon) do you have installed? What language is your Morrowind install?
  • Do you use any mods? If so, does the problem also occur in a clean vanilla install without any mods?
  • Are you using any Advanced settings in your settings file? If so, try reverting to the default settings to see if that changes your issue. Many of these settings are experimental and not widely tested. Note that an improper settings file may cause the game to crash or misbehave; and recent changes to the codebase will sometimes inadvertently break certain configurations.
  • What are the exact steps to reproduce the problem?
  • What did you expect to happen? What happened instead?
  • Are there any error messages in the openmw.log file (see Bug_Reporting_Guidelines#Logs_.26_configuration_files Logs & configuration files?
  • Where is the in-game location this problem can be observed? Avoid vague statements such as "west of town X". Instead, open the console (` key by default, the key above Tab), click on the problematic object, then use the betacomment (bc) instruction:

It will print lots of useful information about the object that you can copy and paste into the bugreport:

Content file: Morrowind.esm
RefID: ex_nord_door_01
Cell: Caldera
Coordinates: Vector3(-12472, 20680, 1652)

Operating System

What operating system where you using when you experienced the issue? If it occurred on multiple OSes, or you are absolutely sure it is not an OS-specific issue, don't select a label.

Attach files

Note: Where possible, please use the GitLab file attachment function rather than an external host (dropbox, etc) so we can be sure the files stay available as long as needed.


Feel free to attach screenshot(s) or videos of the problem. Often this does a much better job of conveying what the problem is than a wall of text.

If you are reporting a performance issue, make sure to include a screenshot of Profiling output.


If the problem occurs when loading a specific savegame, make sure to attach it.

See Paths for the location of save files.

It is a good idea to compress savegames before uploading them (.7z, .rar, .zip, ...) and will also make it less likely to exceed the filesize limit of the bugtracker (5 MB).

Logs & configuration files

Below is a list of configuration files and logs used by OpenMW that can be extremely useful for us in finding the problem. If in doubt, just zip the whole configuration folder and attach it.

See Paths for the location of logs & configuration files.


  • openmw.log: Contains game messages and errors.
  • openmw.cfg: Contains the names of used esm/esp files, bsa archives, data directory and imported Morrowind.ini settings.
  • settings.cfg: Contains user settings as configured by the launcher or the ingame settings menu.
  • input_v3.xml: Contains saved input bindings. Does not need to be attached, unless you are having a problem with input bindings.


  • launcher.cfg


  • openmw-cs.cfg

Stick around

After you've reported the issue, make sure to check back occasionally (or enable email notifications) in case we require more information from you.

Explanation of issue states

  • Closed - either the fix is now available in the main repository, or the issue was rejected for one of the following reasons. If you still see the issue happening, then complain!
    • 1. It is a duplicate of another issue that was already reported earlier (watch for "Duplicates #XYZ" in the activity log).
    • 2. It is a bug in the game data, and not in the engine, so OpenMW cannot fix it.
    • 3. The bug is not reasonably fixable due to constraints outside of our control.

Do not get discouraged when some of your issues get rejected, and feel free to continue reporting any other issues you find.

Test git master

If you are reporting issues frequently, it might be a good idea to switch to testing bleeding-edge builds. That way you can test out the newest features, and we get less reports of problems that have already been fixed in the development version.

We maintain nightly builds for Windows and an Ubuntu PPA. You can also build yourself, which is rather easy on Linux and only takes a few minutes. See Development_Environment_Setup.

Obtain a stack trace

If the problem is a crash or an exception, you can help us by providing a stack trace.

On windows, this requires having a build environment set up.

On Linux, a stack trace is automatically created and a window will pop up telling you where to find it. To work properly, this requires gdb to be installed.

For non-fatal exceptions, OpenMW will not exit. To get a stack trace anyway, you need to launch OpenMW in the debugger and tell it to break on exceptions. For gdb, this can be done with the 'catch throw' command.


If the problem is a regression, i.e. earlier versions of OpenMW did not suffer from the problem, you can help us by identifying the revision that introduced the problem. The git bisect tool makes this very easy. You need a build environment set up to do this.

Start the bisect process using:

 git bisect start

Mark the HEAD revision as bad:

 git bisect bad HEAD

Mark a tag or revision as good (you can get a list of all tags using git tag -l):

 git bisect good openmw-0.29.0 

A revision will now be checked out and you need to build and test whether the problem exists in this revision. If a revision fails to build for some reason, do

 git bisect skip

to skip it. Once you have found a good or bad revision, mark it using either

 git bisect good


 git bisect bad

Now git will checkout the next revision to test. Repeat this process until the first bad commit has been found. Usually this will only take a couple of steps, since it is a binary search.

Model-specific problems

If the problem is with a specific model, you can try disabling optimizations to see if that fixes the issue. If that is indeed the case, we definitely have a bug. See Rendering Architecture#Optimizer for instructions.

In any case, you can greatly speed up the resolution of your issue by extracting some information from the model and posting it with your bug report. Please consider including:

  • A screenshot of the model opened in Tools#NifSkope (with as many nodes as possible and/or relevant ones expanded).
  • From within OpenMW, open the console, click on the model, type 'ShowSceneGraph', then attach the created file.

See also

Bug Triaging Guidelines