MapsetVerifier Save Abandoned

Mapset Verifier (MV) is a desktop app which tests quantifyable issues in beatmapsets from osu!, such as unsnapped objects and unused files. Many of these issues would otherwise disqualify the map from being ranked. Although mainly aimed at Beatmap Nominators, this can also be used by mapset creators and reviewers to speed up the ranking process.

MV is a successor to the game's built-in AiMod and Sieg's Modding Assistant, providing more features and greater scalability. Some examples include auto-updates, plugin support, and integrated documentation and diff utilities.

This is currently being ported to osu!lazer. You can track its progress here!

Note

Some issues are not easily quantified, especially ones related to metadata and timing; far from everything is covered. Also, false positives and false negatives may occur, as with any similar tool. So always use your own judgement and be critical about what the program points out, especially warnings.

Download

See the latest release. On Windows, get the exe file. On Linux, get the tar.gz / use this package on archlinux.

Version	Date Released	Windows	Linux
1.8.2	2021-09-21
1.8.0	2021-09-14
1.7.2	2020-10-07
1.7.1	2020-10-03
1.7.0	2020-09-28
1.6.6	2020-08-04
1.6.5	2020-07-03

Common Problems

• Windows protected pc

  • Solution: More info > Run anyway OR Right click installer > Properties > Unblock
  • Reason: Installer has no signed certificate (costs)

• Stuck on install screen on reinstall

  • Solution: Uninstall before reinstalling
  • Reason: Limitation in electron-builder

• Javascript error ENOENT, no MapsetVerifierBackend.exe in /app/api/win-x86

  • Solution: Uninstall, reinstall, then whitelist this exe in your antivirus before running again
  • Reason: Antivirus false positive, deletes the backend (part that does checks) on first run

• Infinite loading, windows 7 version before KB2533623

  • Solution: Get KB2533623
  • Reason: Backend blocked from running due to DLL loading being insecure without patch

Components

Mapset Verifier is comprised of the following open source .NET Core components:

The remaining HTML/CSS/JS files are available in the application, see /Mapset Verifier/resources/app.

Feature Comparison

Examples of fixed false positives/negatives

Modding Assistant

• counting extended break times as drain time.
• failing to account for minimum SV (0.1x).
• misinterpreting hit sounds on slider bodies as hit sounds on heads/tails.
• completely ignoring storyboard variables and animation frames.

AiMod

• incorrectly detecting unsnaps on slider tails < 2 ms off
• not accounting for stacking.
• using a vastly outdated star rating system, saying you need an easy/normal when you already have one.
• using inaccurate playfield measurements to detect offscreen hit objects.

Plugins

Add check DLLs to %APPDATA%/Mapset Verifier Externals/checks to have them load in just like the default checks. To create these DLLs, have a look at how MapsetChecks was created. This is probably also useful.

Third-party plugins (that I'm aware of):

• CatchCheck by -Keitaro, adds osu!catch-specific checks.
• MapsetChecksCatch by Greaper, adds osu!catch-specific checks.

In general, do be careful about which check plugins you use, as they can be malicious. The plugins are executed by the back end of the application, so they can pretty much do anything the rest of the application can.

Checks (last updated 2021-09-14)

General

All Modes

Standard

Taiko

Catch

Modes apart from standard do not have their SRs implemented, so difficulty levels will likely be wrong.

Reporting Bugs

Either post an issue here or contact me on Discord @naxess. Give beatmapset and reproduction steps if applicable. If you don't have me on discord just join the Aiess Project, after which you should be able to message me.