This article will dissect exactly why this error occurs and provide a step-by-step guide to forcing the software to recognize your valid license. Before diving into fixes, understand the software architecture. Mitsubishi Electric's GT Designer3 uses a modular licensing system . Unlike simple subscription software, GT Designer relies on recognizing a specific hardware ID or a physical key (Licensing USB dongle).
Disclaimer: This article is for troubleshooting purposes. Software licensing agreements vary by region. Always verify your license type (Perpetual vs Subscription) with Mitsubishi Electric Automation.
You know you purchased the software. You have the USB dongle plugged in (or the license file installed), yet the software refuses to launch in "Full Mode" (Edit mode), often relegating you to a read-only "Monitor Mode."
Applies to: GT Designer3 (GOT2000 Series), GT Works3, and older iterations of Mitsubishi Electric’s HMI configuration software.