How To Fix BWSD148 - Type &1 does not support a type switch

SAP Error Message - Details

• Message type: E = Error

• Message class: BWSD - Messages for Scenario Transfer

• Message number: 148

• Message text: Type &1 does not support a type switch

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BWSD148 - Type &1 does not support a type switch ?

  The SAP error message BWSD148, which states "Type &1 does not support a type switch," typically occurs in the context of SAP Business Warehouse (BW) or SAP BusinessObjects when there is an issue with data types during a data transfer or transformation process. This error indicates that the system is trying to perform a type switch (changing the data type of a field) on a data type that does not support such an operation.
  Cause:
  
  Incompatible Data Types: The most common cause of this error is that the data type of the source field does not match the expected data type of the target field. For example, trying to switch from a character type to a numeric type without proper conversion.
  Incorrect Mapping: The mapping of fields in the transformation or data flow may be incorrect, leading to an attempt to switch types that are not compatible.
  Data Source Issues: The data source may have changed, or the structure of the data being loaded may not match the expected structure in the target system.
  
  Solution:
  
  Check Data Types: Review the data types of the source and target fields in the transformation or data flow. Ensure that they are compatible and that any necessary conversions are handled appropriately.
  Adjust Mapping: If the mapping of fields is incorrect, adjust it to ensure that the correct data types are being used. This may involve changing the target field's data type or modifying the source data.
  Use Conversion Functions: If a type switch is necessary, consider using conversion functions (like TO_CHAR, TO_NUMBER, etc.) to explicitly convert the data from one type to another before the switch.
  Review Data Source: Ensure that the data source is providing the expected structure and data types. If there have been changes to the source, update the transformation accordingly.
  Debugging: Use the debugging tools available in SAP BW to trace the data flow and identify where the type mismatch is occurring.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Refer to the SAP BW documentation for information on data types, transformations, and data flows to better understand how to manage data type compatibility.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the BWSD148 error and implement a solution to resolve it.