# Dual Output – Error Solution Guide

### Overview

PRISM Live Studio provides a **Dual Output** feature that allows you to stream both **horizontal** and **vertical** broadcasts simultaneously.\
This feature lets creators deliver content optimized for both PC and mobile viewers at the same time.

However, some users have encountered the following error message:

<figure><img src="/files/7hFOUzgUSmtBzwSPm9TQ" alt=""><figcaption></figcaption></figure>

This error occurs when Dual Output is enabled, but **only one of the two outputs** — either **Horizontal Output** or **Vertical Output** — has a connected channel.

<br>

### Cause

When using the Dual Output feature, you must connect **at least two channels**, and both output directions must have assigned channels.

To summarize:

1. At least **two streaming channels** must be connected.
2. Both **Horizontal Output** and **Vertical Output** must have their respective channels assigned.

***

### Solution

#### CASE 1. Only one channel is linked while Dual Output is enabled

**Problem**

You are trying to use Dual Output, but only **one channel** has been connected.

<figure><img src="/files/CA9lGRngqWp3JzSuMcGk" alt=""><figcaption></figcaption></figure>

**Solution**

1. Click the **three-dot menu (⋮)** next to **My Channel**.
2. Select **Add Channels** to connect an additional channel.
   * At least two channels must be connected to use Dual Output.
3. After adding the channel, make sure both **Horizontal Output** and **Vertical Output** are properly assigned.

   <figure><img src="/files/tqmnPKlcAPIzzwG7mu42" alt=""><figcaption></figcaption></figure>
4. Click **Go Live** to begin your broadcast.

***

#### CASE 2. Multiple channels are linked, but only one output is assigned

**Problem**

Dual Output is enabled and more than one channel is connected,\
but only one output (e.g., **Horizontal Output**) has been configured — while the other (**Vertical Output**) remains empty.

<figure><img src="/files/06bOUetljMS4yVEWtjsB" alt=""><figcaption></figcaption></figure>

**Solution**

1. Hover over a channel and click the **Dual Output icon (PC + Mobile icon)**.

   <div align="left"><figure><img src="/files/1tqKxJLHvSndxUt9Vdiw" alt=""><figcaption></figcaption></figure></div>
2. Select the unassigned output (e.g., **Vertical Output**) to assign a channel.
3. Verify that both **Horizontal Output** and **Vertical Output** have connected channels.

   <figure><img src="/files/nXULT7mP8vhaZ2H39lst" alt=""><figcaption></figcaption></figure>
4. Click **Go Live** to begin your broadcast.


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