A Valid Accumark License Was Not Found For This Product May 2026

If no keys are listed, your computer does not recognize the dongle or the software license. If a key is visible but the error persists, the license may not cover the specific version of AccuMark you are trying to run (e.g., trying to run V15 with a V12 license). 4. Update the Sentinel Drivers

The error usually triggers because the service has stopped, the dongle is unrecognized, or the license has expired. Step-by-Step Troubleshooting 1. Check the Physical Connection If you use a USB dongle:

If you are a fashion professional or pattern maker using Gerber Technology’s AccuMark software, encountering the error can bring your entire production line to a halt. This message typically indicates a communication breakdown between the software and its security authorization—whether that’s a physical USB dongle or a digital cloud license. a valid accumark license was not found for this product

Most Gerber dongles have a solid red or green light. If it’s blinking or dark, the hardware might be failing or the port is dead. Try a different USB port (preferably on the back of the PC if using a desktop). 2. Restart the Sentinel LDK License Manager

Here is a comprehensive guide to why this happens and how to fix it. Common Causes of the Error If no keys are listed, your computer does

Outdated drivers are a frequent culprit, especially after a Windows Update.

A floating license managed by a server.

Your license "bit" may need an update to support a newer version of the software.

If you are on a subscription model, your payment may have failed or the term ended. Update the Sentinel Drivers The error usually triggers

AccuMark relies on a background service to "see" the license. If this service crashes, the software won't open. Press Windows Key + R , type , and hit Enter. Scroll down to find Sentinel LDK License Manager . Right-click it and select Restart .