How To Fix M8428 - Field &1 must not be filled in purchase orders for external services

M8428 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 428

• Message text: Field &1 must not be filled in purchase orders for external services

What causes this issue?

You are entering a purchase order for external services, and have set
the final invoice indicator. For technical reasons, this is not
permitted. The system automatically sets the final invoice indicator.

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?

Check the entries in the followingg fields:
Table HeaderData, field BLLSRV_IND (Service indicator)
Table ItemData, field FINAL_INV (Final invoice indicator)
If the BLLSRV_IND field is filled, then the FINAL_INV field must not be
filled.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8428 - Field &1 must not be filled in purchase orders for external services ?

  The SAP error message M8428, which states "Field &1 must not be filled in purchase orders for external services," typically occurs when there is an issue with the configuration or data entry related to purchase orders for external services in the SAP system. Here’s a breakdown of the cause, potential solutions, and related information:
  
  Cause:
  
  Incorrect Field Usage: The error indicates that a specific field (denoted by &1) is being filled in a purchase order for external services, which is not allowed. This could be due to incorrect data entry or misunderstanding of the field's purpose.
  
  Configuration Issues: The system may be configured in such a way that certain fields are not supposed to be filled when creating purchase orders for external services.
  Service Master Data: The service master data may have incorrect settings or attributes that lead to this error when creating or modifying purchase orders.
  
  
  Solution:
  
  Review the Purchase Order: Check the purchase order