How To Fix /SAPAPO/OM_ERROR2221 - Doubled key error when adding a matrix

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OM_ERROR2 -

• Message number: 221

• Message text: Doubled key error when adding a matrix

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_ERROR2221 - Doubled key error when adding a matrix ?

  The SAP error message /SAPAPO/OM_ERROR2221 indicates a "Doubled key error" when trying to add a matrix in the Advanced Planning and Optimization (APO) module. This error typically occurs when there is an attempt to create or modify a matrix (such as a planning object or a key figure) that has duplicate keys or identifiers, which violates the uniqueness constraint required by the system.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that the matrix you are trying to add already contains entries with the same key or identifier. This could happen if the data was imported or if there are existing entries that were not properly cleaned up.
  Incorrect Configuration: There may be a configuration issue where the key fields are not set up correctly, leading to conflicts when new entries are added.
  Data Consistency Issues: If there are inconsistencies in the data model or if the data has been corrupted, it can lead to this error.
  
  Solution:
  
  Check for Duplicates: Review the existing entries in the matrix you are trying to add. Look for any duplicate keys or identifiers that may already exist. You can do this by querying the relevant tables or using transaction codes that allow you to view the matrix data.
  Data Cleanup: If duplicates are found, you will need to either delete or modify the existing entries to ensure that all keys are unique before attempting to add the new matrix again.
  Review Configuration: Check the configuration settings for the matrix and ensure that the key fields are defined correctly. Make sure that the uniqueness constraints are properly set up.
  Use Transaction Codes: Utilize transaction codes like /SAPAPO/OM01 (for matrix management) to view and manage matrices. This can help you identify any issues with the current setup.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of APO you are using. There may be specific patches or updates that address this issue.
  Contact SAP Support: If the issue persists after checking for duplicates and reviewing configurations, consider reaching out to SAP support for further assistance. They may provide insights or solutions based on the specific context of your system.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on handling matrix-related issues.
  APO Documentation: Review the official SAP APO documentation for best practices on managing matrices and understanding key constraints.
  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 the cause of the /SAPAPO/OM_ERROR2221 error and implement a solution to resolve it.