How To Fix M8164 - You must enter a reference for document type &

M8164 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 164

• Message text: You must enter a reference for document type &

What causes this issue?

You have not entered a <LS>Reference</>. The Customizing system is set
so that a reference must be entered for document type &V1&.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Check the document type. If it is correct, you must enter a
<LS>Reference</>.

Error message extract from SAP system. Copyright SAP SE.

M8164 - Details

• The SAP error message M8164 ("You must enter a reference for document type &") typically occurs in the context of inventory management or material document processing. This error indicates that a reference document (such as a purchase order, production order, or another relevant document) is required for the specific document type you are trying to create or process, but it has not been provided.
  
  Cause:
  
  Missing Reference Document: The document type you are working with requires a reference (e.g., a purchase order number) to be entered, but it has not been provided.
  Configuration Settings: The configuration for the document type may be set to require a reference, and the system is enforcing this rule.
  User Input Error: The user may have overlooked entering the required reference field.
  
  
  Solution:
  
  Enter the Required Reference: Check the document type you are working with and ensure that you enter the appropriate reference document number in the designated field.
  Review Document Type