Many assets are repairable by substituting a similar KUID. For example, a missing tree KUID can often be replaced with a built-in tree. To do this:
Warning: Only substitute assets of the same type (e.g., replace a horn sound with another horn sound, not a bogey).
Some fan sites (e.g., Trainz Kuid Index, JointedRail, RRMods) allow KUID lookup, but they may not have current data. Always verify assets via the DLS or Content Manager first.
You perform a KUID search when an asset is “unknown” or “missing.” Common causes:
A successful KUID search tells you:
The final step in any exhaustive KUID search trainz journey is human interaction. The Trainz community is older, dedicated, and incredibly helpful.
Etiquette Guide: When asking for help, do not just post Help I need kuid:123:456. Instead, post:
"Looking for kuid:123:456 (Auran Jet Engine sound). Checked DLS and TrainzKUIDIndex, no luck. Running TRS22. Any help appreciated?" kuid search trainz
This shows you have done your homework, and people will respect that.
Every Trainz user knows the sinking feeling. You download a highly-rated route from the Download Station, load it up, and see the dreaded red error icons. The route works, but the rolling stock is missing, replaced by ubiquitous "dummy" assets.
Because the Trainz ecosystem has spanned two decades (from Trainz 1.0 to TRS22/Plus), assets have migrated, servers have changed, and creators (content creators) have come and gone. The file name you see in the menu (e.g., "GP40 CN") is often useless for finding the specific file you need. This is where the KUID becomes the golden key.
KUID search is a small but critical skill for Trainz users. Mastering it means fewer broken routes, faster troubleshooting, and smoother collaboration with creators. Focus on authoritative sources, verify versions, and lean on community documentation to turn KUID search from a nuisance into a straightforward part of your Trainz workflow.
Finding missing KUIDs (Kuju Unique Identifiers) in Trainz is often best handled by specialized search databases and community tools. Top KUID Search Tools
If an asset is listed as "Unknown" in your Content Manager, it likely resides on a third-party site rather than the official Download Station (DLS). Use these resources to track them down:
TrainzKuidIndex (TKI): A comprehensive database that searches across many common Trainz websites. Note that it requires a registered account (and some features may be behind a subscription). Many assets are repairable by substituting a similar KUID
kuid base (Trainz-MP): A large repository particularly useful for Russian and Eastern European content. It allows for advanced filtering by KUID, author, or asset type.
General Search Engines: Copying the KUID (e.g.,
You can also find related assets or authors directly within the game’s Content Manager:
Filter by Author ID: Use the syntax #userID (e.g., #522774) in the search bar to find every asset created by a specific developer.
Identify Revisions: In a KUID like z at the end indicates the version number. Higher numbers are newer revisions of the same asset. Alternative Solutions
Substitution: If a KUID is truly lost, you can "clone" a similar working asset and change its KUID in the config.txt file to match the missing one, effectively tricking the game into using a placeholder.
Delete Missing Assets: If the missing KUID isn't critical (like a small piece of grass), you can use the Delete Missing Assets function in Surveyor to clean up the route. Useful Find: Trainz Kuid Searcher Warning: Only substitute assets of the same type (e
simulator universe, a (Kooltag Unique IDentifier) is a mandatory, unique identification string assigned to every asset, from a single tree to a complex locomotive. KUID searching is the primary method used by creators and players to track down specific assets or locate "missing dependencies"—supporting files required for a larger piece of content to function correctly. Understanding KUID Structure A standard KUID string looks like
) is a unique number assigned by that creator to a specific item. Version Number: formats, a third number (e.g.,
) indicates the version. Higher numbers represent more recent updates of the same asset. Primary Search Tools & Websites
Finding unknown KUIDs often requires searching beyond the official Download Station (DLS), as many creators host files on private websites. kuid base - Trainz-Mp
" often refers to assets like high-resolution 3D resin kits or static scenery objects. In configuration files, it can also relate to " bulk solids " categories ( ) for commodities like iron ore. How to Search for a KUID In Content Manager Open Content Manager and use the tool (top left). Click the arrow to add a new line, select Asset KUID , and paste your KUID. Alternatively, click the
column to sort the entire list numerically and scroll to your number. While in Surveyor Main Menu > Options and check the box for " show object/track/train kuids in surveyor
This allows you to see the KUID of any asset you select with the "Get" tool. Online Databases Trainz-Mp KUID Base to search for missing dependencies or specific author IDs. The popular TrainzKuidIndex
was a primary tool but has reportedly shut down its services. KUID Format Breakdown Standard KUIDs follow the format: