How To Fix RJ405 - The field &1 in extract structure &2 can be in lowercase

SAP Error Message - Details

• Message type: E = Error

• Message class: RJ - BW Extractor Handling Message Class

• Message number: 405

• Message text: The field &1 in extract structure &2 can be in lowercase

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RJ405 - The field &1 in extract structure &2 can be in lowercase ?

  The SAP error message RJ405 indicates that there is an issue with the data extraction process, specifically related to the field names in the extract structure. The message states that the field specified (represented by &1) in the extract structure (represented by &2) can only be in lowercase. This typically occurs in the context of SAP BW (Business Warehouse) or data extraction processes where field names are expected to follow certain naming conventions.
  Cause:
  
  Field Naming Convention: In SAP BW, field names in extract structures must adhere to specific naming conventions, which often require them to be in lowercase. If a field name is defined in uppercase or mixed case, it can trigger this error.
  Data Source Configuration: The error may arise from the configuration of the data source or the extraction structure where the field names are not correctly defined.
  Inconsistent Naming: If the field names in the source system do not match the expected format in the target system, this error can occur.
  
  Solution:
  
  Check Field Names: Review the field names in the extract structure and ensure that they are all in lowercase. If any field names are in uppercase or mixed case, change them to lowercase.
  Modify Extract Structure: If you have access to the data model, modify the extract structure to ensure compliance with the naming conventions.
  Recreate Data Source: If necessary, you may need to recreate the data source or the extract structure to ensure that all field names are correctly defined.
  Transport Requests: If changes are made in a development environment, ensure that they are transported to the production environment correctly.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of SAP BW you are using for any additional guidelines on naming conventions.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions for this error.
  Data Modeling Guidelines: Familiarize yourself with SAP BW data modeling guidelines, which often include best practices for naming conventions.
  Testing: After making changes, perform testing to ensure that the extraction process works as expected without triggering the error.
  
  By following these steps, you should be able to resolve the RJ405 error and ensure that your data extraction processes function correctly.