> ## Documentation Index
> Fetch the complete documentation index at: https://docs.thrindex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# E0008 — JsonParseError

> The artifact file is not valid JSON.

<Warning>E0008: artifact JSON parse error</Warning>

## What happened

The `.thx` file could not be parsed as JSON. It is either not a THRINDEX artifact, or it was corrupted.

## Why

* The file is not a `.thx` artifact (e.g. you passed a `.pt` PyTorch checkpoint or a text file)
* The file was truncated during transfer
* A text editor or transfer tool modified the encoding

## How to fix

1. Confirm you are passing a `.thx` file, not a `.pt`, `.pkl`, or `.json` file from a different tool.
2. If the file should be a valid artifact, recompile: `thx.compile(model, "model.thx")`.
3. If the artifact was transferred, re-transfer in binary mode (not text mode).

## Example

```
E0008: artifact JSON parse error: expected value at line 1 column 1
Why: the file is not valid thrindex artifact JSON.
Fix: verify the file was produced by `thx.compile()` and was not corrupted in transfer.
Docs: https://docs.thrindex.com/errors/E0008
```