# 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
*

```
<div align="left"><figure><img src="/files/euhfr1Xy0UZ9F5izKYvV" alt=""><figcaption></figcaption></figure></div>
```

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.

{% hint style="info" %}
**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.
  {% endhint %}


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