| Scenario | Description | |----------|-------------| | | You just bought a servo drive and controller card. The driver CD installs RegServo, but motion commands return error 0x40E: "License Required". | | Post-trial expiration | A 30-day trial has ended. Every time you start the machine, a dialog box appears: "RegServo – License key missing. Enter key to continue." | | Feature upgrade | Your factory added a fifth axis to a CNC router. The vendor sends a new license key regservo to enable "MultiAxis_5" feature. | | Hardware change | You replaced a failed motherboard. RegServo now shows "Invalid License – Hardware ID mismatch." |
| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | "Key format invalid" | Extra spaces or dashes. | Re-type manually or paste into Notepad first to strip formatting. | | "Hardware ID mismatch" | You changed RAM, CPU, or boot drive. | Contact vendor for a license (one free per year, typically). | | "License expired" | Subscription-based license. | Renew via vendor portal. Do not change system date; RegServo uses NIST time. | | "Signature verification failed" | Key is for a different product (e.g., RegServo Lite vs Pro). | Verify the exact software version. Run RegServoInfo.exe to see required product code. | | "Clock tampering detected" | System time rolled back to extend trial. | Reset CMOS battery, sync time with w32tm /resync , then request a new trial. | license key regservo
Manufacturers in sectors like CNC machining, collaborative robotics, and automated packaging lines embed RegServo as the middleware between a PC-based HMI (Human-Machine Interface) and the physical servo drive. | Scenario | Description | |----------|-------------| | |