How To Fix M8021 - Document type & not defined for invoice verification

M8021 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 021

• Message text: Document type & not defined for invoice verification

What causes this issue?

The error message can have the following two causes:
No document type has been configured in Customizing for transaction
&V2& that you are executing.
You have entered a document type that has not been defined for Invoice
Verification.

How to fix this error?

Check the Customizing setting in 'Document types: invoice verification'
(<DS:TRAN.OMR4>Proceed</>), or change the document type.

Error message extract from SAP system. Copyright SAP SE.

M8021 - Details

• The SAP error message M8021, which states "Document type & not defined for invoice verification," typically occurs during the invoice verification process in the Materials Management (MM) module. This error indicates that the document type being used for the invoice is not configured correctly in the system for the invoice verification process.
  
  Cause:
  
  Missing Configuration: The document type used for the invoice (e.g., standard invoice, credit memo) is not defined in the system for invoice verification.
  Incorrect Document Type: The document type may be incorrectly specified in the invoice or may not be applicable for the transaction being performed.
  Authorization Issues: The user may not have the necessary authorizations to process the specific document type.
  
  
  Solution:
  To resolve the M8021 error, you can follow these steps:
  
  
  Check Document Type Configuration:
  
  Go to the SAP transaction code SPRO (Customizing).
  Navigate to Materials Management > Logistics Invoice Verification > Define Document Types for Invoice Verification.
  Ensure that the document type in question