How To Fix /PF1/MSG_PO091 - Lock Reason field is mandatory

SAP Error Message - Details

• Message type: E = Error

• Message class: /PF1/MSG_PO -

• Message number: 091

• Message text: Lock Reason field is mandatory

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PF1/MSG_PO091 - Lock Reason field is mandatory ?

  The SAP error message /PF1/MSG_PO091 Lock Reason field is mandatory typically occurs in the context of purchase order (PO) processing, particularly when trying to create or modify a purchase order in the SAP system. This error indicates that the "Lock Reason" field, which is required for the transaction, has not been filled in.
  Cause:
  The error is triggered because the system requires a value in the "Lock Reason" field to proceed with the transaction. This field is often used to indicate why a purchase order is being locked, which can be important for tracking and auditing purposes.
  Solution:
  To resolve this error, you need to ensure that the "Lock Reason" field is filled in before attempting to save or process the purchase order. Here are the steps you can take:
  
  
  Access the Purchase Order Screen: Go to the transaction where you are encountering the error (e.g., ME21N for creating a purchase order).
  
  
  Locate the Lock Reason Field: Look for the "Lock Reason" field in the relevant section of the screen. This may be in the header or item details, depending on your SAP configuration.
  
  
  Enter a Valid Lock Reason: Select or enter a valid reason for locking the purchase order. This could be a predefined value or a custom entry, depending on your organization's practices.
  
  
  Save the Purchase Order: After filling in the "Lock Reason" field, try to save the purchase order again.
  
  
  Check User Authorizations: If you are unable to enter a value in the "Lock Reason" field, ensure that you have the necessary authorizations to modify this field.
  
  
  Related Information:
  
  Configuration: The requirement for the "Lock Reason" field may be configured in the SAP system. If this is a new requirement, it may have been introduced by a recent update or configuration change.
  User Exits or BAdIs: If your organization has custom logic implemented through user exits or BAdIs, check if there are any custom validations that might be affecting the "Lock Reason" field.
  Documentation: Refer to your organization's SAP documentation or help resources for specific guidelines on how to fill in the "Lock Reason" field and any predefined values that should be used.
  SAP Notes: Check the SAP Support Portal for any relevant notes or updates related to this error message, as there may be patches or updates that address this issue.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.