Every time a Consignment is Submitted, it will create a Message Request to the Shipping Agent Integration API Endpoint for the Shipping Agent being used on the Consignment. The latest request sent can be downloaded by selecting the Download Request option on the Ribbon.
In addition to the above, you can also view every Message Requests associated with a Consignment by selecting Related > Message Requests.
The Message Request are displayed with the most recent at the top. Submissions that produced an error are displayed in red. There should only be one successful submission (i.e. displayed in black) per Consignment.
By selecting the line with an Error Status then selecting Related > Error Log you will be able to see the error message returned by the Shipping Agent API.
Please also refer to the Clever Dynamics - Exporting Message Requests section for more information.