How To Fix FOAP_CD_ASSIGNMENT028 - Document &2 has invoice reference &1

SAP Error Message - Details

• Message type: E = Error

• Message class: FOAP_CD_ASSIGNMENT - Assignment of Open Credits and Payments

• Message number: 028

• Message text: Document &2 has invoice reference &1

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 FOAP_CD_ASSIGNMENT028 - Document &2 has invoice reference &1 ?

  The SAP error message FOAP_CD_ASSIGNMENT028 indicates that there is an issue with the assignment of a document in the context of invoice references. Specifically, the message states that the document (identified by &2) has an invoice reference (identified by &1), which may not be allowed in the current context or transaction.
  
  Cause:
  
  Duplicate Invoice Reference: The document you are trying to process may already be linked to an invoice reference, which is causing a conflict.
  Incorrect Document Type: The document type you are using may not support invoice references, or the system may not allow the assignment of an invoice reference in the current transaction.
  
  Configuration Issues: There may be configuration settings in the SAP system that restrict the assignment of invoice references under certain conditions.
  Data Entry Errors: There could be a mistake in the data entry, such as entering the wrong document number or invoice reference.
  
  
  Solution:
  
  Check Document Status: Verify the status of the