How To Fix RSAN_UT003 - Conversion not possible because field type is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAN_UT - Messages for Analysis Services, Tools, Utilities

• Message number: 003

• Message text: Conversion not possible because field type is unknown

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSAN_UT003 - Conversion not possible because field type is unknown ?

  The SAP error message RSAN_UT003: Conversion not possible because field type is unknown typically occurs in the context of data extraction or transformation processes, particularly when working with SAP BW (Business Warehouse) or SAP HANA. This error indicates that the system is unable to determine the data type of a field, which prevents it from performing necessary conversions or operations.
  Causes:
  
  Field Definition Issues: The field in question may not be properly defined in the data source or InfoObject. This can happen if the field is missing metadata or if there are inconsistencies in the data model.
  Data Source Changes: If the underlying data source (like a database table or view) has been modified (e.g., fields added, removed, or renamed) without updating the corresponding InfoObjects or data models in BW, it can lead to this error.
  Data Type Mismatch: There may be a mismatch between the expected data type in the BW model and the actual data type in the source system.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production) and the transport did not include all necessary objects, it could lead to missing field definitions.
  
  Solutions:
  
  Check Field Definitions: Verify that the field in question is correctly defined in the InfoObject or data source. Ensure that all necessary metadata is present.
  Update Data Model: If the underlying data source has changed, update the corresponding InfoObjects or data models in BW to reflect these changes.
  Data Type Consistency: Ensure that the data types in the source system match the expected data types in the BW model. You may need to adjust the data type in the InfoObject or the source system.
  Re-activate InfoObjects: Sometimes, re-activating the InfoObjects or the data model can resolve inconsistencies. This can be done in the SAP BW modeling tools.
  Check Transport Requests: If the issue arose after a transport, check the transport requests to ensure that all necessary objects were included and correctly transported.
  Debugging: If the issue persists, consider debugging the data flow to identify where the conversion is failing. This may involve looking at the transformation rules or data flow logic.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Use transaction codes like RSA1 (Data Warehousing Workbench) to check InfoObjects and data sources, and RSRT (Query Monitor) to test queries.
  Documentation: Review SAP documentation on data modeling and extraction processes for best practices and troubleshooting tips.
  
  If the problem continues after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further assistance, as they may have more insights into the specific configurations and customizations in your environment.