# `yt_run_ReloadScript` -- Reload Script

## `yt_run_ReloadScript`
```cpp
int yt_run_ReloadScript(const char* flag_file_name, const char* reload_file_name, const char* script_name);
```
- Usage: Start [Reloading Script](../in-situ-python-analysis/reloading-script.md#reloading-script) phase when `<flag_file_name>` file is detected, or an error occurred when running inline functions. `libyt` starts reloading the script `<script_name>` if `<reload_file_name>` file is detected, and it exits the API if `<reload_file_name>_EXIT` file is detected. Outputs will be printed in `<reload_file_name>_SUCCESS` or `<reload_file_name>_FAILED`.
- Return: 
  - `YT_SUCCESS`
  - `YT_FAIL`: When `libyt` is not compiled with `-DINTERACTIVE_MODE`, it returns `YT_FAIL`.

> {octicon}`info;1em;sd-text-info;` Must compile `libyt` with [`-DINTERACTIVE_MODE=ON`](../how-to-install/details.md#-dinteractive_mode-off).

## Example
The code will stop and enter reloading script phase, if `LIBYT_STOP` is detected or an inline function failed.
It will reload `test_reload.py` when `RELOAD` file is detected, and it will exit the API once `RELOAD_EXIT` is detected.
Output results will be printed in `RELOAD_SUCCESS` or `RELOAD_FAILED`.
See [Reloading Script](../in-situ-python-analysis/reloading-script.md#reloading-script) for details.

```cpp
#include "libyt.h"
...
if (yt_run_ReloadScript("LIBYT_STOP", "RELOAD", "test_reload.py") != YT_SUCCESS) {
    fprintf(stderr, "ERROR: yt_run_ReloadScript failed!\n");
    exit(EXIT_FAILURE);
}
```