if you encounter "Internal error: null pointer access" at startup. MITSUBISHI ELECTRIC Global website Preventing Future License Errors Help For Data Transfer Tool - Mitsubishi Electric
GT Designer3 updates and add-ons are often distributed as separate packages. If you install an upgrade or an environment update on a clean machine without installing the standard base version first, the license check will fail.
: Look for folders named "GT Designer," "GT Works," or "GT Title" (common in some software variants). Rename or Delete
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. gt designer license not found
Open the Windows and navigate to Programs and Features .
and restart. If already set to English, toggle to another language, restart, then toggle back. Reinstall or Update
| Action | Detail | |--------|--------| | | Provide error screenshot, license type (dongle ID or license number), and software version. | | Reinstall Windows & software | Last resort – sometimes license corruption remains after uninstall. | | Order new license | If physical dongle is dead, you need a replacement (cost involved). | if you encounter "Internal error: null pointer access"
Is this a license or a floating network license?
Restart your computer to clear out cached registry keys.
Ensure you are using the correct version of GT Designer for your hardware. For example, projects require GT Designer3 Version 1.100E or later. If you're using an older version, the software may not recognize the license for that specific hardware series. Re-initialize Library/AppData (If error persists) : : Look for folders named "GT Designer," "GT
If your activation data has been wiped or corrupted, re-entering your Product ID (serial number) will rebuild the license paths. Open the Windows . Navigate to the MELSOFT Application folder.
Right-click on the shortcut icon on your desktop. Select Properties . Go to the Compatibility tab. Check the box for Run this program as an administrator .