| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | | You typed the key manually or included extra spaces. | Paste directly from the email. Ensure there are 5 groups of 5 characters. | | “License key not found in database” | The key is for SmartPLS 3, not 4. | SmartPLS 3 keys are not compatible with SmartPLS 4. You must upgrade/buy a new license. | | “Maximum number of activations exceeded” | You installed on multiple PCs (e.g., work, home, laptop). | You are allowed 2 concurrent activations per license. Deactivate one device via the SmartPLS Customer Portal. | | “Activation server unreachable” | Firewall or proxy blocking port 443 (HTTPS). | Add SmartPLS 4 to your firewall’s allow list. Or use Offline Activation. | | “License expired” | Your 1-year subscription has ended. | Renew your license on the SmartPLS website. You do not need to reinstall; just enter the new key. | | “Clock has been tampered with” | System date is incorrect. | Sync your system clock with internet time (Settings > Time & Date > Sync now). |
If your lab uses a floating license server, add this line instead: smartpls 4 license key install
: Run the downloaded .exe (Windows) or .dmg (Mac) file and follow the default on-screen instructions. 2. License Activation Steps | Error Message | Likely Cause | Solution
On a device with internet access, visit the SmartPLS offline activation portal. Input your and the generated Machine Code . | | “License key not found in database”
Follow these steps to activate your professional or trial key: Open SmartPLS 4.