---
title: "Script Debugging"
slug: "script-debugging"
updated: 2025-11-06T18:16:09Z
published: 2025-11-06T18:16:09Z
canonical: "docs.doc-know.com/script-debugging"
---

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

# Script Debugging

### Script Debugging

**Script Debugging** refers to the process of using the **App Simulator** to test your app's **scripts**.

### Running the Script Debugger

With your app open in the **App Simulator**, click on the **Script Debugger** button on the right-hand side of the navigation toolbar.

![icon_script_debugger](https://cdn.document360.io/84e9ea69-d7ee-46a4-a14f-453de3411633/Images/Documentation/icon_script_debugger.png)

The tool will appear as a flyout on the right side of your screen.

![dk_apps_sim_script_debugger](https://cdn.document360.io/84e9ea69-d7ee-46a4-a14f-453de3411633/Images/Documentation/dk_apps_sim_script_debugger.png)

### Overview

Play around and get familiar with the features this tool offers.

At the top you can see the version of your app as well as the **time** it took to run your app's **Ux.Test** script.

          Tip

          

App scripts should take **milliseconds** to run. Anything over 350 milliseconds should concern you and prompt you to make your script more efficient.

Use the **status** at the top of this tool to see if your script ran successfully or encountered an error. If an **error** occurs, you will see details about the error so you can fix the issue.

The green **Test** button will run your app's **Ux.Test** script immediately whenever you click it. Recall, this is a special script used for testing. Once you feel like this script is running as expected, you can copy and paste this script into another production event inside [App Builder](https://docs.doc-know.com/docs/app-installation).

### Output Log

At the bottom of the **Script Debugger** tool is the **Output Log**.

Your scripts can output information based on variable conditions within your scripts. This is a very useful tool when developing your scripts.

[Learn more about writing to the output log from your scripts](https://docs.doc-know.com/docs/debug-log)

### Real Time Updates

When you want to make a change to your app scripts in [App Builder](https://docs.doc-know.com/docs/app-installation), you can do so without having to close or re-open the **App Simulator**.

1. Make your script changes in [App Builder](https://docs.doc-know.com/v1/docs/install-symmetry-pro) and click **Save**.
2. Make sure the **Reload App** option is checked in the **Script Debugger**.  

This forces a reload of your app just before the **Ux.Test** script runs.
3. Click **Test** inside the **Script Debugger**.

Your changes are immediately reflected! Do this as much as needed.

### Additional Resources

Here are a few related resources that can be found in this documentation.

[Learn more about scripting](https://docs.doc-know.com/docs/script-intro)

[Learn more about runtime events](https://docs.doc-know.com/docs/events)

[Learn more about programming fundamentals](https://docs.doc-know.com/docs/fundamentals)

[Learn more about what your scripts can do using graph objects](https://docs.doc-know.com/docs/graph-intro)