How To Fix /SAPAPO/ATP018 - Requirements scheduling index &1 does not exist in the reference table

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 018

• Message text: Requirements scheduling index &1 does not exist in the reference table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP018 - Requirements scheduling index &1 does not exist in the reference table ?

  The SAP error message /SAPAPO/ATP018 Requirements scheduling index &1 does not exist in the reference table typically occurs in the context of Advanced Planning and Optimization (APO) when the system is unable to find a specific scheduling index for a given requirement. This can happen for various reasons, including data inconsistencies or missing configurations.
  Cause:
  
  Missing Scheduling Index: The scheduling index for the specified requirement does not exist in the reference table. This can occur if the index has not been created or if it has been deleted.
  Data Inconsistencies: There may be inconsistencies in the master data or transaction data that prevent the system from locating the required index.
  Configuration Issues: Incorrect configuration settings in the APO system can lead to the absence of the required scheduling index.
  Transport Issues: If the system has recently undergone a transport of changes, the scheduling index may not have been transported correctly.
  
  Solution:
  
  
  Recreate the Scheduling Index:
  
  Use transaction /SAPAPO/SDP94 to regenerate the scheduling index for the relevant product and location combination. This will create the necessary index if it is missing.
  
  
  
  Check Master Data:
  
  Ensure that the master data (like product master, location master, etc.) is correctly maintained and that there are no inconsistencies.
  Verify that the product is active and has the necessary planning data.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the APO system to ensure that they are set up correctly for the requirements planning process.
  Ensure that the relevant planning areas and planning books are correctly defined.
  
  
  
  Transport Check:
  
  If the issue arose after a transport, check the transport logs to ensure that all necessary objects were transported correctly.
  If needed, re-transport the relevant objects or manually create the missing scheduling index.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/SDP94 for scheduling index maintenance and /SAPAPO/MC90 for checking planning area settings.
  Documentation: Review SAP documentation related to Advanced Planning and Optimization, particularly sections on scheduling and requirements planning.
  Support: If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the steps you have already taken.
  
  By following these steps, you should be able to resolve the error message and ensure that the scheduling index is correctly maintained in your SAP APO system.