---
title: Marketplace Launch Application 404 Error
slug: bhdo/marketplace-launch-application-404-error
createdAt: 2024-09-24T20:10:02.778Z
---

Launching an application to Belden Horizon Data Operation results in 404 NOT FOUND error.

![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/s-9EO78a3UkM1gKu5ZLsY_image.png)

# Possible Causes / Resolutions

| **Possible Cause**                                                                                                                                                                                                                  | **Resolution / Workaround**                                                                                                                                                   |
| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| This Belden Horizon Data Operation instance was previously activated to a different Belden Horizon Data Manager. You are trying to launch an application from a catalog that has the same name as a catalog from the previous BHDM. | On the Belden Horizon Data Operation instance, delete any catalogs that were synchronized from other Belden Horizon Data Managers. Then, try launching the application again. |