> For the complete documentation index, see [llms.txt](https://docs.incari.com/incari-studio/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.incari.com/incari-studio/toolbox/communication/tcp/events/ontcperror.md).

# On TCP Error

## Overview

![The On TCP Error Node.](/files/okpSIm2sfYcjSVy5SZNa)

**On TCP Error** is an **Event Listener Node** that executes and triggers a **Logic Branch** when an **Error** in the connection occurs and returns the **Error** `Message`.

**TCP Communication** in **Incari** is available as a plugin and is enabled as default. However, in the case that it is disabled in the **Plugins Editor**, it will not appear in the **Project Settings** and **On TCP Error** will not show up in the [**Toolbox**](https://github.com/cgi-studio-gmbh/incari-doc/blob/2025.1/toolbox/communication/overview.md). Please refer to the [**Plugins Editor**](/incari-studio/modules/plugins/communication/tcpconnectionsmanager.md) to find out more information.

[**Scope**](/incari-studio/toolbox/overview.md#scopes): **Project**, **Scene**.

## Attributes

![The On TCP Error Node Attributes.](/files/XFPVB8DgfGUkincHDVzy)

| Attribute       | Type          | Description                                                                                                                                                              |
| --------------- | ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `Configuration` | **Drop-Down** | The desired *TCP* server, which refers back to the selections made under *TCP* in the [**Project Settings**](/incari-studio/modules/project-settings/tcp-connection.md). |

## Outputs

| Output             | Type       | Description                                                                                                                            |
| ------------------ | ---------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| *Pulse Output* (►) | **Pulse**  | A standard **Output Pulse**, to move onto the next **Node** along the **Logic Branch**, once this **Node** has finished its execution. |
| `Message`          | **String** | The returned **Error** `Message`.                                                                                                      |