When processing orders you might come across the "6521 ERROR Weight - Package weight is less than the minimum for requested service/packaging in RequestedPackage" error.
This message is shown when there is an attempt to process an order that has a weight which is not valid for the service level that you're trying to process the order through.
There are two approaches to solve this issue:
Feel free to follow this video guide, or the step-by-step procedure below.
To solve this issue you will have to:
1. Click the Edit button of the order that contains the box you need to correct
2. Select the Packaging tab; this tab shows a list of all the boxes included in the order
3. Verify the weight of the boxes as required and do the necessary changes
4. Press Save to apply changes