Import TMK Error: 74496

If you encounter the error "Update key failed, import TMK: -74496" while importing a TMK (Terminal Master Key) in the key loader, follow these steps to diagnose and resolve the issue:

Check Key Length

• Verify that the length of the TMK is correct. The TMK length must match the required specifications for your system. Using a key of incorrect length can lead to this error.

Check Delivery Type

• Confirm that the delivery type or method for the TMK is appropriate. The delivery method should align with the security protocols and standards of your system

• 

1. Wizarhand Q1v1: Target POS is old product model of Q1.

2. PINPAD: Target is external PINPAD.

3. Others: Target POS is Q2, Q3 and other models.

Note:

• The error code -74496 might indicate specific issues related to key format, encryption standards, or system compatibility. It's crucial to approach the troubleshooting systematically, checking each potential cause one by one.

• If the issue persists, reach out to the technical support team for your key loader or the provider of the TMK for further assistance.