Corrective Action When the “License Verification Failed. (1006)” Message Appears After a KDS 2.0 Internet Update

1. Symptoms

KDS 2.0 / KDS 2.0 

• After the Internet update is completed, clicking the Install button launches Smart Launcher and prompts for a license key.
• After the license key is entered, a failure message appears during verification.

• Product installation is complete, but the license verification process cannot continue.

2. Main Cause (Root Cause)

🟥 1) Incorrect tablet date/time settings (primary cause)

• The tablet's Date & Time setting is not configured to Automatic.
• License verification uses server-time-based validation logic.
  • Verification fails when the tablet time does not match the server time.

🟥 2) The license key itself is not the cause

• The license key entered by the customer is in the correct format.
• Successful verification with the same license key was confirmed after correcting the settings.

▶ Overall Assessment

• Defective license key ❌
• KDS 2.0 app defect ❌
• Server issue ❌
• Tablet Environment Configuration Error ✔

3. Policy Decision

4. Final Resolution

✔ Enable automatic date and time on the tablet

• Settings path:

  Settings → General/General management → Date and time → Automatic date and time: On

✔ Restart the KDS 2.0 app and retry license verification

✔ Confirm that license verification is completed successfully

• The software upgrade can then proceed normally.