How To Fix R8655 - Field &1: no key field (not dependent on extract structure)

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 655

• Message text: Field &1: no key field (not dependent on extract structure)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R8655 - Field &1: no key field (not dependent on extract structure) ?

  The SAP error message R8655, which states "Field &1: no key field (not dependent on extract structure)," typically occurs in the context of data extraction, particularly when working with DataSources in SAP BW (Business Warehouse) or when dealing with data extraction from SAP ERP systems.
  Cause:
  This error generally indicates that the field specified (represented by &1) is not defined as a key field in the underlying data structure. In SAP BW, key fields are essential for uniquely identifying records in a data source. If a field is not marked as a key field, it cannot be used in certain operations, such as data extraction or transformation processes.
  Possible Causes:
  
  Field Configuration: The field in question may not be configured as a key field in the underlying table or structure.
  DataSource Definition: The DataSource may not have been set up correctly, leading to the absence of key fields.
  Changes in Data Model: If there have been recent changes to the data model or the underlying database structure, it may have affected the key field definitions.
  Incompatibility: The field may not be compatible with the extraction structure being used.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Definition:
  
  Go to the Data Dictionary (transaction SE11) and check the definition of the table or structure that contains the field. Ensure that the field is defined as a key field.
  
  
  
  Review DataSource Configuration:
  
  In the DataSource (transaction RSA1), check the configuration of the DataSource to ensure that the key fields are correctly defined. You may need to adjust the DataSource settings to include the necessary key fields.
  
  
  
  Adjust Extraction Logic:
  
  If you are using a custom extraction logic (e.g., ABAP code), ensure that the logic correctly handles key fields and that the field in question is included as a key field.
  
  
  
  Recreate DataSource:
  
  If the DataSource is not configured correctly, consider recreating it. This can help ensure that all necessary fields, including key fields, are included.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific DataSource or field to understand any specific requirements or configurations needed.
  
  
  
  Testing:
  
  After making changes, test the extraction process again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Data Modeling: Familiarize yourself with data modeling concepts in SAP BW, particularly the importance of key fields in DataSources and InfoObjects.
  Transaction Codes: Common transaction codes related to DataSources and data extraction include RSA1 (Data Warehousing Workbench), SE11 (Data Dictionary), and RSA3 (DataSource Test).
  
  By following these steps, you should be able to identify the cause of the R8655 error and implement a solution to resolve it.