How To Fix /SCMTMS/TRQ451 - Cannot select freight document; mandatory default route exists

/SCMTMS/TRQ451 - Overview

• Message type: E = Error

• Message class: /SCMTMS/TRQ -

• Message number: 451

• Message text: Cannot select freight document; mandatory default route exists

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCMTMS/TRQ451 - Cannot select freight document; mandatory default route exists ?

  The SAP error message /SCMTMS/TRQ451 Cannot select freight document; mandatory default route exists typically occurs in the SAP Transportation Management System (TM) when there is an issue with the routing of a freight document. This error indicates that a mandatory default route has been defined for the transportation request, but the system is unable to select a freight document due to this constraint.
  
  Cause:
  
  Mandatory Default Route: A default route has been set as mandatory in the system, which means that the system expects this route to be used for the transportation request.
  Route Determination Issues: The system may not be able to find a suitable freight document that matches the mandatory default route criteria.
  Missing or Incorrect Data: There may be missing or incorrect data in the transportation request or in the master data (e.g., location, transportation lanes, etc.) that prevents the system from selecting the appropriate freight document.
  
  Configuration Issues: The configuration settings