> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso/documentation/actions/group-code-flow/on-error...-end-on-error.md).

# On Error... End On Error

**On Error... End On Error**

This action is used to show a message error to the user. Typically, have a [*Message Box*](/kalipso/documentation/actions/group-others/message-box.md) and a [*Cancel* ](/kalipso/documentation/actions/group-code-flow/cancel.md)actions between *On Error* and *End On Error*.

Action available for the following operating systems:

<figure><img src="https://1614058754-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJ5vDGuBZwhJDeu5Rq7Wt%2Fuploads%2Fgit-blob-7a7ab3f3fc74afcaab1e0810f419316203cc49e1%2F01_Supported_OS.png?alt=media" alt="OS Supported: Android, iOS, Win, Win32"><figcaption></figcaption></figure>

{% hint style="info" %}
This Action is auto-generated by Kalipso when user does actions that generates errors.
{% endhint %}