---
description: This is an error!
---

# Core.py return code list

| Code | Message                                            | Solution                                                                  |
| ---- | -------------------------------------------------- | ------------------------------------------------------------------------- |
| 1    | [Lo-runner](installing-lo-runner) is not installed | Install Lo-runner                                                         |
| 2    | Core.py is not found                               | Install Core.py                                                           |
| 101  | [Lo-runner](installing-lo-runner) is not installed | Install Lo-runner                                                         |
| 102  | System argument parse fail                         | Send an [issue](https://github.com/XiaoGeNintendo/HHSOJ-Essential/issues) |
| 103  | Runner core failed                                 | Send an [issue](https://github.com/XiaoGeNintendo/HHSOJ-Essential/issues) |
| 104  | Cannot check result code                           | Send an [issue](https://github.com/XiaoGeNintendo/HHSOJ-Essential/issues) |
