How To Fix VT621 - The assignment and reference number fields must be ' ' or E

SAP Error Message - Details

• Message type: E = Error

• Message class: VT - Vertriebstabellen

• Message number: 621

• Message text: The assignment and reference number fields must be ' ' or E

What causes this issue?

In the controls for copying billing document (F2) from credit memo (CR)
or debit memo (DR) the assignment number and reference number fields
should be ' ' or contain 'E'.
This message appears if VBTYP for the source document is 'M' and VBTYP
for the target billing document is '0' or 'P'. This copy control means
that the billing document is created directly from a credit memo or a
debit memo.

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?

Leave the assignment number and reference number field blank or enter
'E'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VT621 - The assignment and reference number fields must be ' ' or E ?

  The SAP error message VT621 indicates that there is an issue with the assignment and reference number fields in a transaction related to transport management or logistics. This error typically arises when the system expects these fields to be either empty (' ') or contain the value 'E' (which usually stands for "external" or "error"). 
  Cause:
  
  Incorrect Data Entry: The fields for assignment and reference numbers may have been filled with invalid data that does not meet the expected criteria.
  Configuration Issues: There may be a configuration issue in the transport management system or the specific module you are working with.
  Custom Development: If there are custom developments or enhancements in your SAP system, they might be causing the fields to be populated incorrectly.
  
  Solution:
  
  Check Field Values: Review the values entered in the assignment and reference number fields. Ensure they are either left blank or set to 'E'.
  Review Configuration: If you have access, check the configuration settings related to the transport management system or the specific module to ensure they are set up correctly.
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction you are working with to understand the expected values for these fields.
  Debugging: If you have access to debugging tools, you can trace the program execution to see where the values are being set and why they are not meeting the expected criteria.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or SAP's customer support for further assistance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error message or provide additional context.
  Transaction Codes: Identify the transaction code that triggered the error to understand the context better.
  User Roles and Authorizations: Ensure that the user has the necessary roles and authorizations to perform the action that led to the error.
  Testing in a Sandbox: If possible, replicate the issue in a sandbox environment to test potential solutions without affecting production data.
  
  By following these steps, you should be able to identify the cause of the VT621 error and implement a solution.