How To Fix MN778 - Supplier billing document header not found (internal error)

MN778 - Overview

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 778

• Message text: Supplier billing document header not found (internal error)

What causes this issue?

Largely identical to 215, 216, 779
When the system checked the supplier billing documents (settlement
documents) that were created via the general billing interface, it did
not find a supplier billing document header that should really exist.

System Response

The system recognizes that data is inconsistent, and does not perform
the function you required.

How to fix this error?

Contact your system administrator. The problem is probably due to a
program error.
The arrangement concerned is &V1&, the condition record concerned has
(internal) number &V2&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

MN778 - Details

• The SAP error message MN778, which states "Supplier billing document header not found (internal error)," typically indicates that the system is unable to locate the header information for a supplier billing document. This can occur due to various reasons, including data inconsistencies, missing entries, or issues with the document processing.
  Causes:
  
  Missing Document: The billing document may not have been created or saved properly.
  Data Inconsistency: There may be inconsistencies in the database, such as missing or corrupted entries related to the billing document.
  Authorization Issues: The user may not have the necessary permissions to access the billing document.
  System Errors: Internal errors in the SAP system or issues with the database can lead to this error.
  Incorrect Document Type: The document type being processed may not correspond to a valid supplier billing document.
  
  Solutions:
  
  Check Document Existence: Verify if the supplier billing document exists in the system. You can do this by using transaction codes like MRBR