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Error: "Unknown CDP version" or "Unsupported compression." Cause: You are using a CDP Extractor v1.0 on a CDP file created by Trainz 2022. Solution: Use TrainzUtil (included with your game). No third-party tool supports the latest CDP format 100% of the time.

The user chooses an output folder. The extractor writes each asset as a containing the raw source files (e.g., .config.txt , .tga or .png images, .wav sounds, .pm or .im meshes).

: Instead of installing a massive pack of 100 items just to get one locomotive, you can use an extractor to pull out individual assets as separate CDPs.

The extractor decompresses the CDP’s internal data stream. Unlike a simple ZIP file, the CDP format uses Trainz‑specific compression and may include binary blobs (e.g., .texture, .im, .lm.txt files). A proper extractor preserves this internal structure.