# Debugging locally with Hansken All in One (AIO)

.. note:: this feature is available from Hansken 46.4.0

.. warning:: `DeferredExtractionPlugin` are currently NOT supported

It is also possible to debug an Extraction Plugin with a locally running Hansken AIO. This requires a few steps:

1. Start your plugin in your IDE (default port 8999)
   ![1_debug_start_plugin_in_ide.png](1_debug_start_plugin_in_ide.png)
2. Set some breakpoint(s)
   ![2_debug_set_breakpoints.png](2_debug_set_breakpoints.png)
3. Prepare an extraction in the AIO **with advanced** options
   ![3_debug_prepare_extraction.png](3_debug_prepare_extraction.png)
4. Enable the `DebugExtractionPluginTool` for this extraction
   ![4_debug_enable_debug_tool.png](4_debug_enable_debug_tool.png)
5. Start extraction, and happy debugging!

### Tips/notes:

- You can only debug 1 plugin at a time
  - .. note:: If you are debugging `MyPlugin`, and it is also visible in the tools list, then you need to **disable** it, and **only enable** the `DebugExtractionPluginTool`
- Test your plugin with a small image. Otherwise, it might take long before you reach your breakpoint.
- Be careful when using this debugger with `APPEND` extractions:
    - Similar to other tools/plugins, the `DebugExtractionPluginTool` will only run once per trace
    - So if you need to re-run your debug session, then we advise you to re-extract `(INDEX)` your project instead
- Hansken runs multiple instances of every Tool, so the same breakpoint can be hit multiple times concurrently by
  different instances
  - limiting the number of plugin threads/workers can minimize this
    - see [Specifying system resources (Python)](../python/snippets.md#Specifying system resources)
- Only restart your plugin before starting an extraction. Restarting your plugin **during** an extraction can
  produce
  **undefined behaviour**.