How To Fix /PM0/AB_AT121 - Source PDS &1 has no previous mapping to table &2; check Customizing

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/AB_AT -

• Message number: 121

• Message text: Source PDS &1 has no previous mapping to table &2; check Customizing

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/AB_AT121 - Source PDS &1 has no previous mapping to table &2; check Customizing ?

  The SAP error message /PM0/AB_AT121 indicates that there is an issue with the mapping of a source PDS (Process Data Structure) to a target table in the system. This error typically arises in the context of Advanced Planning and Optimization (APO) or similar modules where data structures are mapped for planning purposes.
  Cause:
  The error message suggests that the source PDS specified does not have a corresponding mapping in the target table. This can occur due to several reasons:
  
  Missing Customizing Entries: The necessary customizing entries for the mapping between the source PDS and the target table have not been defined.
  Incorrect Configuration: There may be an error in the configuration settings that define how the PDS should be mapped to the target table.
  Data Integrity Issues: The data in the source PDS may not be correctly set up or may be incomplete, leading to a failure in mapping.
  Transport Issues: If the PDS was transported from another system, the necessary customizing settings may not have been transported correctly.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Customizing Settings:
  
  Go to the relevant customizing transaction (e.g., SPRO) and navigate to the section where PDS mappings are defined.
  Ensure that there is a valid mapping for the source PDS to the target table. If not, create the necessary entries.
  
  
  
  Verify PDS Configuration:
  
  Check the configuration of the source PDS to ensure that it is correctly set up and that all required fields are populated.
  Ensure that the PDS is active and correctly linked to the relevant planning area.
  
  
  
  Review Transport Requests:
  
  If the PDS was recently transported, check the transport requests to ensure that all necessary customizing settings were included and correctly imported into the target system.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific version of your SAP system for any known issues or additional configuration steps that may be required.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the process to identify where the mapping is failing. This may require technical expertise in ABAP or the specific module you are working with.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue through the above steps, consider reaching out to SAP support for assistance. Provide them with the error message details and any relevant configuration information.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/PDS for PDS management, and SPRO for customizing.
  SAP Notes: Search for SAP Notes related to the error message or the specific PDS functionality you are working with, as they may provide additional insights or solutions.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message /PM0/AB_AT121.