How To Fix COM_ATTRFRG_GEN128 - Key attributes must be at the beginning

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_ATTRFRG_GEN - Message Class for Generating Attributes and Sets

• Message number: 128

• Message text: Key attributes must be at the beginning

What causes this issue?

For technical reasons, key attributes must be positioned at the top of
the attribute table on the <LS>Attributes Assigned</> tab page. Key
attributes are those attributes for which the <LS>Field Is Key</>
indicator has been set.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message COM_ATTRFRG_GEN128 - Key attributes must be at the beginning ?

  The SAP error message COM_ATTRFRG_GEN128 with the description "Key attributes must be at the beginning" typically occurs in the context of attribute fragmentation in SAP's data modeling or reporting tools, such as SAP BW (Business Warehouse) or SAP HANA. This error indicates that the key attributes in a data model or a query must be positioned at the beginning of the attribute list.
  Cause:
  The error is caused by the incorrect arrangement of attributes in a data model or query definition. In SAP, key attributes (which are essential for identifying records uniquely) must be defined at the start of the attribute list. If they are placed after non-key attributes, the system will throw this error.
  Solution:
  To resolve this error, you should:
  
  
  Identify Key Attributes: Determine which attributes in your model are considered key attributes. These are typically the attributes that uniquely identify a record in your dataset.
  
  
  Rearrange Attributes: Modify the order of the attributes in your data model or query definition. Ensure that all key attributes are listed at the beginning of the attribute list.
  
  
  Save and Activate: After rearranging the attributes, save your changes and activate the data model or query to ensure that the changes take effect.
  
  
  Test the Model/Query: Run the model or query again to verify that the error has been resolved.
  
  
  Related Information:
  
  Key Attributes: These are attributes that uniquely identify a record in a dataset. In a database context, they are often primary keys.
  Attribute Fragmentation: This refers to the way attributes are organized and stored in a data model. Proper organization is crucial for performance and data integrity.
  SAP Documentation: For more detailed information, refer to the official SAP documentation or help resources related to data modeling and attribute management in the specific SAP module you are using.
  
  If you continue to experience issues after following these steps, consider consulting with your SAP administrator or a technical consultant who specializes in SAP data modeling.