[Bug]: Running LUA method 'update'

[dozerjz]

Description

I was trying to fix a tractor, did not have the vehicle loaded with oils, so i canceled the fix, load the vehicle, and tried to go back into run the repair for the service truck, and this happened:

2026-04-02 20:13:33.441 Error: Running LUA method 'update'.
C:/Users/Jacob Ziller/Documents/My Games/FarmingSimulator2025/mods/FS25_UsedPlus/src/gui/ServiceTruckDialog.lua:484: invalid option '%>' to 'format'

Going to try and recreate it again, have to work in a few hours..... so cant tonight :)

Steps to Reproduce

fix vehicle with service truck

UsedPlus Version

latest

Other Mods Installed

442 mods

Game Mode

Singleplayer

Log File

C:/Users/Jacob Ziller/Documents/My Games/FarmingSimulator2025/mods/FS25_UsedPlus/src/gui/ServiceTruckDialog.lua:484: invalid option '%>' to 'format'
2026-04-02 20:14:48.895 Application exit request forced.
2026-04-02 20:14:48.895 Application exit request forced.

Screenshots

No response

[XelaNull]

Fixed in v2.15.4 🔧

Thanks for the detailed report, Jacob — the reproduction path (cancel → load fluids → retry) was exactly the clue we needed.

Root cause: The translation string for the reliability display contained literal % signs (72% > Target: 90%+). When Lua's string.format parsed that text, it hit %> and threw invalid option '%>' to 'format'.

What we fixed:

• Updated the reliability display translation in all 26 supported languages to use proper format specifiers (%d%% for the dynamic percentage value, %% to escape literal % signs)
• Handled several language variants that stored the string differently (Chinese Traditional, Finnish, Japanese, Indonesian)
• Added a pcall safety guard so if a translation ever introduces this pattern again, it logs a diagnostic warning instead of crashing

Version: v2.15.4 — available now in the latest build.

Please let us know if the crash persists after updating. Thank you for taking the time to report this! 🙏

---

🇬🇧 English recap

Translation string usedplus_st_currentTarget had literal % signs that crashed Lua's string.format. Fixed in all 26 language files by converting example text to proper Lua format specifiers. Added pcall safety canary in ServiceTruckDialog.lua. Available in v2.15.4.

[XelaNull]

⏱️ Auto-close in 3 days

If you're able to test with the latest build and confirm the crash no longer occurs, we'll close this issue. If we don't hear back by 2026-04-08, it will be closed automatically assuming the fix worked.

Thank you again for the report!