> 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/5.0/developing/form/actions/actions-description/group-code-flow/on-error...-end-on-error.md).

# On Error... End On Error

Kalipso - Form - Actions - Actions Description - Group Code - On Error... End On Error

This action is used to show a message error to the user. Typically, have a [*Message Box*](/kalipso/5.0/developing/form/actions/actions-description/group-others/message-box.md) and a [*Cancel* ](/kalipso/5.0/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:

![](https://3821468174-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LrTlA1suFa5N48x_83N%2F-MAlPVpH3WRwBy16c7JY%2F-MAlQBZuuTnc6hyzKSVQ%2Fimage.png?alt=media\&token=5c9534b7-ca05-4ac4-b408-2207cd5a5295)

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