found on your license certificate or the original DVD-ROM case. MELSOFT Environment Selection
SoftGOT requires a bound to the PC’s MAC address or HDD serial. If reinstalling Windows → license invalid. You must re-host the license (contact Mitsubishi distributor).
If using floating license server:
A common "license not found" or "project cannot open" error occurs when trying to work with GS-series HMIs (like the GS21) without having the specific support package installed.
Furthermore, the error serves as a case study in the challenges of lifecycle management in industrial IT. Automation software often has a lifespan that far exceeds that of typical office software. A factory may run the same version of GT Designer for a decade to maintain compatibility with legacy machinery. However, modern operating systems evolve rapidly. When an engineering workstation is upgraded to a newer version of Windows, the legacy licensing services associated with older versions of GT Designer may become obsolete or incompatible. This creates a "zombie" software state where the application is installed, but the licensing verification architecture is broken. Consequently, the "License Not Found" message is often the symptom of a broader IT/OT (Information Technology/Operational Technology) convergence gap, where the rapid pace of IT updates clashes with the static stability requirements of OT.
