How To Fix IWO_BAPI154 - Reservation effectivity/purch. req. 'Immediate' can no longer be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: IWO_BAPI - BAPIs for ALM Orders: Messages

• Message number: 154

• Message text: Reservation effectivity/purch. req. 'Immediate' can no longer be changed

What causes this issue?

You tried to change the settings of a PM or CS order with regard to the
times when reservations are effective or the issuing of purchase
requisitions. However, the order is configured such that reservations
and purchase requisitions are created immediately. This setting can no
longer be changed.

System Response

The system terminates processing.

How to fix this error?

Check your entries.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IWO_BAPI154 - Reservation effectivity/purch. req. 'Immediate' can no longer be changed ?

  The SAP error message "IWO_BAPI154 Reservation effectivity/purch. req. 'Immediate' can no longer be changed" typically occurs in the context of working with reservations or purchase requisitions in SAP. This error indicates that the system is preventing changes to a reservation or purchase requisition that has already been marked as "Immediate," meaning it is already in a state where it cannot be modified.
  Cause:
  
  Status of the Reservation/Purchase Requisition: The reservation or purchase requisition has been processed to a point where it is locked for changes. This could be due to it being converted into a purchase order or being part of a production order.
  Time Constraints: The system may have time constraints that prevent changes to immediate requirements once they have been set.
  Configuration Settings: Certain configuration settings in the SAP system may enforce strict rules on how and when reservations or purchase requisitions can be modified.
  
  Solution:
  
  Check the Status: Review the status of the reservation or purchase requisition. If it has been converted to a purchase order or is linked to a production order, you may need to make changes at that level instead.
  Use Transaction Codes: Use transaction codes like ME52N (Change Purchase Requisition) or MB22 (Change Reservation) to check the details and status of the document.
  Consult with a SAP Administrator: If you believe that the reservation or purchase requisition should be editable, consult with your SAP administrator or support team to check if there are any configuration settings that need to be adjusted.
  Create a New Document: If changes are not possible, consider creating a new reservation or purchase requisition that reflects the required changes.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions.
  Documentation: Review SAP documentation related to reservations and purchase requisitions to understand the business processes and system behavior.
  User Permissions: Ensure that you have the necessary permissions to make changes to reservations or purchase requisitions, as restrictions may be in place based on user roles.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.