How To Fix /ISDFPS/MM599 - It is not possible to change items of an EPA/HU purchase requisition

SAP Error Message - Details

• Message type: E = Error

• Message class: /ISDFPS/MM -

• Message number: 599

• Message text: It is not possible to change items of an EPA/HU purchase requisition

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /ISDFPS/MM599 - It is not possible to change items of an EPA/HU purchase requisition ?

  The SAP error message /ISDFPS/MM599 indicates that there is an issue with changing items in a purchase requisition that is associated with an External Procurement Agreement (EPA) or Handling Unit (HU). This error typically arises when certain conditions or restrictions are in place that prevent modifications to the purchase requisition items.
  Cause:
  
  Status of the Purchase Requisition: The purchase requisition may be in a status that does not allow changes. For example, if it has already been converted into a purchase order or if it is locked for some reason.
  Document Type Restrictions: Certain document types may have restrictions on modifications after they have been created.
  Integration with External Systems: If the purchase requisition is linked to an external procurement agreement or handling unit, there may be restrictions imposed by the integration settings.
  User Authorizations: The user may not have the necessary authorizations to make changes to the purchase requisition.
  
  Solution:
  
  Check the Status: Verify the status of the purchase requisition. If it has been converted to a purchase order, you will need to make changes at the purchase order level instead.
  Review Document Type Settings: Check the configuration of the document type used for the purchase requisition to see if there are any restrictions on changes.
  Consult with the Integration Team: If the requisition is linked to an external procurement agreement or handling unit, consult with the team responsible for the integration to understand any limitations.
  User Authorizations: Ensure that the user has the necessary authorizations to modify the purchase requisition. If not, contact your SAP security team to request the appropriate access.
  Use Transaction Codes: If you need to make changes, consider using transaction codes like ME52N (Change Purchase Requisition) or ME53N (Display Purchase Requisition) to check the details and status.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional guidance.
  Documentation: Review SAP documentation related to purchase requisitions, external procurement agreements, and handling units for more context on how these elements interact.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP support team for further assistance.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.