> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/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/kalipso5/developing/form/actions/actions-description/group-code-flow/on-error...-end-on-error.md).

# On Error... End On Error

This action is used to show a message error to the user. Typically, have a [*Message Box*](/kalipso5/developing/form/actions/actions-description/group-others/message-box.md) and a [*Cancel* ](/kalipso5/developing/form/actions/actions-description/group-code-flow/cancel.md)actions between *On Error* and *End On Error*.

Action available for the following operating systems:

![](/files/-MAlQBZuuTnc6hyzKSVQ)

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