The message is a "placeholder error," which happens when the game's code calls for a specific piece of text—like the name of a location or a pawn—but can't find it, so it just gives up and shows the raw code instead. The example from the official Ludeon forums is a perfect case: a player received a quest whose name was displayed as ERR: [Joiner_nameDef]'s [site/site_label] . This guide will cover the four main causes of this error and provide a step-by-step troubleshooting plan to get your colony back on track.
Use external tools to organize your load order properly.
: The error often stems from mods that affect world map generation , factions , or storytellers . rimworld err site label detected new
It looks like you’re referencing an error message from the game :
The game relies on dynamic data generation to fill out the brackets: The message is a "placeholder error," which happens
AppData\LocalLow\Ludeon Studios\RimWorld by Ludeon Studios\Saves ) and create a copy before editing. Open with a Text Editor : Use a tool like to open the Search for "ERR"
Prevention is better than cure. By following these best practices, you can significantly reduce the chances of encountering this and other issues: Use external tools to organize your load order properly
Dynamic Site Labeling System (with Error Recovery)
If the game cannot find the data needed to fill those tags, it bypasses program crashes by gracefully throwing a safe substitute string: . Primary Causes Mid-Save Mod Removal
This eliminates confusion and prevents the error from spamming the debug log.
Always structure your framework load structure in this exact order: