---
title: "Error has occurred or invalid license when entering Retrospect license codes"
slug: "error-has-occurred-or-invalid-license-when-entering-retrospect-license-codes"
updated: 2023-11-09T01:22:15Z
published: 2023-11-09T01:26:19Z
canonical: "docs.retrospect.com/error-has-occurred-or-invalid-license-when-entering-retrospect-license-codes"
---

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

# Error has occurred or invalid license when entering Retrospect license codes

Resources

Before you can enter an add-on license code to the Retrospect software, you must first enter the primary Application License code such as the Professional or Single Server license. Once you have entered the application license code, you will be prompted to enter your add-on licenses.

You can also go to the License Manager screen inside Retrospect and enter any newly purchased add-on license codes.

Last Update: February 14, 2012