How To Fix APPL_MM_PUR_PO018 - You are not authorized to update the item data of the purchase order

APPL_MM_PUR_PO018 - Overview

• Message type: E = Error

• Message class: APPL_MM_PUR_PO - Message Class for Purchase Order

• Message number: 018

• Message text: You are not authorized to update the item data of the purchase order

Self-Explanatory Message

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APPL_MM_PUR_PO018 - Details

• The SAP error message APPL_MM_PUR_PO018 indicates that a user is not authorized to update the item data of a purchase order. This error typically arises in the Materials Management (MM) module when a user attempts to modify a purchase order but lacks the necessary permissions.
  
  Cause:
  
  Authorization Issues: The most common cause of this error is that the user does not have the required authorization roles or permissions to make changes to the purchase order item data.
  Role Configuration: The roles assigned to the user may not include the necessary authorizations for the specific transaction or object.
  Document Status: The purchase order may be in a status that does not allow changes (e.g., if it has been fully delivered or invoiced).
  Field-Level Security: Certain fields may have additional restrictions that prevent updates based on user roles.
  
  
  Solution:
  
  
  Check User Authorizations:
  
  Use transaction code SU53 immediately after encountering the error to check the authorization check that failed. This will