How To Fix SOS_MAPPING128 - Key characteristic has been set automatically to READ ONLY

SAP Error Message - Details

• Message type: E = Error

• Message class: SOS_MAPPING - Object Services: Persistence Mapping for Messages

• Message number: 128

• Message text: Key characteristic has been set automatically to READ ONLY

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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 SOS_MAPPING128 - Key characteristic has been set automatically to READ ONLY ?

  The SAP error message SOS_MAPPING128 indicates that a key characteristic in a data model or mapping has been set to "READ ONLY" automatically. This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when working with data models, InfoObjects, or transformations.
  Cause:
  
  Automatic Setting: The key characteristic is automatically set to read-only due to certain conditions in the data model or transformation. This can happen if the characteristic is derived from another source or if it is part of a hierarchy or aggregation that does not allow changes.
  Data Source Configuration: The data source or the way the data is being loaded may restrict changes to certain key characteristics.
  Transformation Rules: If the transformation rules define that the characteristic should not be modified, it will be set to read-only.
  Data Integrity: SAP may enforce read-only status to maintain data integrity, especially if the characteristic is critical for reporting or analysis.
  
  Solution:
  
  Review Data Model: Check the data model or InfoObject settings to understand why the characteristic is set to read-only. Look for any dependencies or settings that might enforce this behavior.
  Check Transformation Rules: Review the transformation rules associated with the data load. Ensure that the rules do not inadvertently set the characteristic to read-only.
  Modify Data Source: If applicable, adjust the data source configuration to allow for changes to the key characteristic.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version you are using, as there may be known issues or additional configuration steps required.
  Contact 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 context of your implementation.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on handling read-only characteristics.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Training and Documentation: Review training materials or documentation related to SAP BW or HANA modeling to better understand how key characteristics are managed.
  
  By following these steps, you should be able to identify the cause of the SOS_MAPPING128 error and implement a suitable solution.