How To Fix CLBW004 - No key field found for creation of DataSource

SAP Error Message - Details

• Message type: E = Error

• Message class: CLBW - Classification and BW

• Message number: 004

• Message text: No key field found for creation of DataSource

What causes this issue?

During generation of a classification or configuration DataSource, only
those key fields for the object table (field "Obj.Tabelle") that are
already present in the basis DataSource transferred to the extract
structure. This is the case when none of the key fields of the
object table were found in the structure of the basis DataSource.

System Response

A DataSource cannot be created without key fields. The action was
cancelled.

How to fix this error?

Check whether you have selected the correct basis DataSource and
object table. For more information, please see SAP Note 569849.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLBW004 - No key field found for creation of DataSource ?

  The SAP error message CLBW004 indicates that there is no key field found for the creation of a DataSource. This typically occurs when you are trying to create a DataSource in SAP BW (Business Warehouse) and the system cannot identify a unique key field in the underlying data structure (like a table or view) that is necessary for the DataSource to function correctly.
  Causes:
  
  Missing Key Field: The underlying table or view does not have a primary key or unique identifier defined.
  Incorrect Data Source Definition: The DataSource may be incorrectly defined, leading to the system not recognizing any key fields.
  Data Source Type: The type of DataSource you are trying to create may not support the structure of the underlying data.
  Data Structure Changes: Changes in the underlying data structure (like renaming or removing fields) may have led to the absence of key fields.
  
  Solutions:
  
  
  Check Underlying Data Structure:
  
  Verify that the underlying table or view has a primary key defined. If not, you may need to add a unique key field to the data structure.
  
  
  
  Define Key Fields in DataSource:
  
  When creating the DataSource, ensure that you explicitly define the key fields. You can do this in the DataSource definition screen.
  
  
  
  Use a Different Data Source Type:
  
  If the current DataSource type does not support the structure of your data, consider using a different type that is more appropriate for your data model.
  
  
  
  Review DataSource Settings:
  
  Go through the DataSource settings and ensure that all necessary fields are correctly mapped and that the DataSource is configured properly.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on creating DataSources and defining key fields.
  
  
  
  Check for Updates or Notes:
  
  Sometimes, SAP releases notes or updates that address specific issues. Check the SAP Support Portal for any relevant notes related to this error.
  
  
  
  Related Information:
  
  SAP BW Documentation: Review the official SAP BW documentation for guidelines on DataSource creation and key field definitions.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found effective.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) for managing DataSources.
  
  By following these steps, you should be able to identify the cause of the CLBW004 error and implement a solution to successfully create your DataSource.