This comprehensive guide will help you understand why this error occurs and walk you through step-by-step solutions to get your project running. What Causes the "GT Designer License Not Found" Error?
Ensure you have entered the 12-digit Product ID found on your license certificate during installation. If you are using an older installation media with a newer Product ID, the installer might fail to recognize it.
HKEY_LOCAL_MACHINE\SOFTWARE\Mitsubishi\GT Designer3\License
This tool can sometimes repair the link between the software and the registered license key. 4. The "Clean Reinstall" Method gt designer license not found
Navigate to the add-on directory, typically (DVD drive)\Disk2\AddonProject\GTSV .
If you have a physical copy, verify the "Software Registration Card" to confirm the user ID matches the installed version. Adjust Windows Display Settings Set the Windows font size to Default (100%)
Did this error happen , or was it working fine before? This comprehensive guide will help you understand why
If you are working on a project from a newer machine, your license check may fail against older software. Visit the Mitsubishi Electric FA Downloads site .
Follow this sequence from quickest fix to advanced recovery.
If you are using a subscription-based license, it may have expired. Node-locked licenses (tied to a specific PC) will fail if you upgrade your motherboard, CPU, or hard drive, as the hardware ID changes. If you are using an older installation media
Use a dedicated Virtual Machine (like VMware or VirtualBox) running Windows for your PLC/HMI automation software. This isolates MELSOFT from disruptive corporate IT updates and antivirus conflicts.
For USB dongle detection, run DongleTest.exe from the same folder.
Complete the installation and restart your PC once more before launching the software. 4. Configure Antivirus and Firewall Exceptions