---
title: "Enable Emitter"
slug: "enable-emitter"
tags: ["HL7"]
updated: 2025-03-26T19:46:57Z
published: 2025-03-26T19:46:57Z
canonical: "documentation.decisions.com/enable-emitter"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.decisions.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Enable Emitter

| Step Details |
| --- |
| **Introduced in Version** | 8.19.0 |
| **Last Modified in Version** | 9.1.0 |
| **Location** | HL7 > Interface Steps |

This HL7 module step allows emitters to be enabled when it is run. Provide the emitter's ID to the step, eliminating the need to manually enable an emitter.

### Prerequisites

This step requires the [HL7 module](https://documentation.decisions.com/docs/hl7-module-overview) to be [installed](https://documentation.decisions.com/docs/installing-modules-decisions) before it will be available in the toolbox.

---

## Properties

#### Inputs

| Property | Description | Data Type |
| --- | --- | --- |
| Id | Id of the desired emitter. | String |

---

## Common Errors

### Exception Message:

*Object reference not set to an instance of an object.*

*Exception invoking method EnableEmitter on class InterfaceSteps.*

### Issue:

The error message received when using an incorrect ID provides no hints regarding the underlying issue.

### Reason:

This error occurs when an invalid or non-existent ID is used for the Enable Emitter/Receiver or Disable Emitter/Receiver steps. As a result, the object reference is not properly set, leading to the exception.

### Fix:

While the Flow continues, any warnings will be recorded in the **Logging Dashboard** under **System > Administration > System Tools**. If an invalid ID is specified for the Enable or Disable Emitter/Receiver steps, the Flow will proceed, but a log entry will indicate that the emitter ID was not found.

---

## Step Changes

| Description | Version | Release Date | Developer Task |
| --- | --- | --- | --- |
| Added Enable Emitter step. | [](https://documentation.decisions.com/v99/docs/version-810x-release-notes)[8.19](https://documentation.decisions.com/v99/docs/version-819x-release-notes) | March 2024 | [DT-040377] |
| Updated the error message for when an incorrect ID is entered into the Enable/Disable Receiver/Emitter steps to make it easier to determine why the error occurred. | [9.1](https://documentation.decisions.com/v99/docs/version-91x-release-notes) | June 2024 | [DT-040537] |