The "GT Designer License Not Found" error typically occurs with Mitsubishi Electric's GT Works3
: Use the full GT Works3 package rather than a standalone GT Designer installer, as the suite includes broader driver and series support.
This article outlines the common causes of this license error and provides detailed troubleshooting steps to get you back to designing. 1. Top Reasons for "GT Designer License Not Found" gt designer license not found
Keep your industrial software isolated inside a VM (such as VMware or VirtualBox). This protects the software from Windows updates that can disrupt registry files.
Mitsubishi includes a utility called .
Always run the installer ( setup.exe ) with administrator privileges to ensure the license is correctly registered in the Windows registry. 2. Add GOT GS-Series Support
On modern Windows operating systems, the license verification background process may be blocked by User Account Control (UAC) or an overprotective antivirus. If the software doesn't have "administrative" permission to read its own license files, it assumes they don't exist. Environment Changes: The "GT Designer License Not Found" error typically
Re-run setup, verify the 9-digit or 10-digit serial configuration string. Registry permission blocks or corrupted pointers
Follow these steps systematically to resolve the error. Start with the simplest checks and work your way through. Top Reasons for "GT Designer License Not Found"