How To Fix /SAPAPO/TDL_DAO137 - Source system has been changed; this is forbidden

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TDL_DAO -

• Message number: 137

• Message text: Source system has been changed; this is forbidden

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/TDL_DAO137 - Source system has been changed; this is forbidden ?

  The SAP error message /SAPAPO/TDL_DAO137 Source system has been changed; this is forbidden typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an attempt to change the source system of a data object that is not allowed. This error is often related to the configuration of the system and the way data is managed within the APO environment.
  Cause:
  
  Source System Change: The error indicates that there has been an attempt to change the source system of a data object (like a planning area, master data, etc.) that is not permitted. This could happen if a user tries to modify the source system in a way that violates the system's configuration rules.
  Data Consistency: The system is designed to maintain data consistency and integrity, and changing the source system could lead to inconsistencies in the data model.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to make changes to the source system settings.
  
  Solution:
  
  Check Configuration: Review the configuration settings in the APO system to ensure that the source system is correctly defined and that no unauthorized changes are being attempted.
  Avoid Changing Source System: If you need to change the source system, consider creating a new data object instead of modifying the existing one. This approach helps maintain data integrity.
  User Authorization: Ensure that the user attempting to make the change has the appropriate authorizations. If not, consult with your SAP security team to grant the necessary permissions.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of APO you are using for any additional guidelines or restrictions regarding source system changes.
  SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They may provide insights based on the specific configuration and version of your system.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  APO Documentation: Review the official SAP APO documentation for best practices regarding data management and source system configurations.
  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 address the error and understand the underlying reasons for its occurrence.