Cost Distribution document creation failed for freight setlmnt. doc. &1

What causes this issue?

You tried to post a freight settlement document with cost distribution
enabled. However the system could not post the cost distribution in
Settlement Management as there were some errors during the creation of
the settlement management documents.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

On the Application Log tab of the freight settlement document<(>,<)>
check the details of the error. If there are missing customizing
entries, contact your system administrator.

Procedure for System Administrators

On the Application Log tab of the freight settlement document<(>,<)>
check the details of the error. If there are missing customizing
entries, you must check that all the settings required to create the
settlement management document to post the cost distribution are set in
the Customizing for Transportation management under <LS>Settlement</> ->
<LS>Freight Settlement</> -> <LS>Integration for Settlement Posting
</>-> <LS>Mapping for Cost Distribution </>

Error message extract from SAP system. Copyright SAP SE.