How To Fix /SAPAPO/RSV509 - Reservation &4: No entry in ORDKEY, method changed from &1 to &2

/SAPAPO/RSV509 - Overview

• Message type: E = Error

• Message class: /SAPAPO/RSV -

• Message number: 509

• Message text: Reservation &4: No entry in ORDKEY, method changed from &1 to &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RSV509 - Reservation &4: No entry in ORDKEY, method changed from &1 to &2 ?

  The SAP error message /SAPAPO/RSV509 indicates that there is an issue with a reservation in the Advanced Planning and Optimization (APO) module. Specifically, the message states that there is "No entry in ORDKEY," and it also mentions that the method has changed from one value to another.
  
  Cause:
  
  Missing Entry in ORDKEY: The error typically arises when the system is trying to access a reservation that does not have a corresponding entry in the order key (ORDKEY) table. This could happen if the order was deleted or if there was a data inconsistency.
  Method Change: The message indicates that the method for processing the reservation has changed, which could be due to configuration changes or updates in the system that affect how reservations are handled.
  
  
  Solution:
  
  Check the Reservation: Verify the reservation in question to ensure that it exists and is correctly configured. You can do this by navigating to the relevant transaction in SAP