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

/PM0/AB_AT121 - Overview

• 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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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 /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