The "License Not Found" error in (part of the MELSOFT GT Works3 suite) typically occurs due to issues with the installation of add-on licenses, corrupted configuration files, or improper software updates. Common Causes of Licensing Errors
The causes of this license error range from simple oversight to more complex technical conflicts with other software. The sections below outline the most common culprits and their definitive solutions.
If these folders or strings are empty or missing, your installation is corrupt, and the software cannot verify your license.
Running the software on a guest account or a corporate network profile that restricts access to the installation directory. Step-by-Step Troubleshooting and Solutions gt designer license not found
Troubleshooting the "GT Designer License Not Found" Error If you are working with Mitsubishi Electric’s HMI software, encountering the (or "License Key Not Found") error can be a major roadblock. This issue typically pops up when you launch GT Designer3 or attempt to communicate with a GOT2000/GOT1000 series terminal.
Open the utility (often bundled in your Start Menu under the Mitsubishi Electric / MELSOFT folder).
GT Designer3 uses environment variables to locate licenses. Ensure these exist: The "License Not Found" error in (part of
If registry keys are missing entirely, running a "Repair" installation via the Windows Control Panel or the original installation media is the cleanest way to restore them.
Launch using elevated administrative privileges or execute an application repair. Version conflicts between GT Designer and GT Simulator
Sometimes the error arises not from a missing license, but from a conflict between different software versions or patches, especially after an update. If these folders or strings are empty or
Before running any major Mitsubishi software updates, create a system restore point.
If you cannot find this utility standalone, you will need to trigger the installation wizard again. Go to -> Programs and Features -> Select GT Works3 / GT Designer3 -> Click Change/Modify (do not uninstall).
Add the C:\Program Files (x86)\MELSOFT folder to your antivirus exclusion list to prevent runtime files from being accidentally quarantined.
Step through the wizard until you reach the input screen and re-enter your official license key exactly as provided on your software certificate. 3. Clear Registry Glitches via Reinstallation