> For the complete documentation index, see [llms.txt](https://engine.place.technology/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://engine.place.technology/api/control/websocket/errors.md).

# Errors

| Name               | Code | Description                                                                   |
| ------------------ | ---- | ----------------------------------------------------------------------------- |
| parse error        | `0`  | invalid JSON sent to the server                                               |
| bad request        | `1`  | request was missing required fields                                           |
| access denied      | `2`  | you don’t have permission to access this system, the access attempt is logged |
| request failed     | `3`  | an error was raised or a promise rejected when processing the request         |
| unknown command    | `4`  | the command type unknown, the connection is logged as suspicious              |
| system not found   | `5`  | the system does not exist                                                     |
| module not found   | `6`  | the module does not exist in the system                                       |
| unexpected failure | `7`  | a framework level error occurred (this should never happen)                   |