How To Fix DDLS197 - Type of case expression in selection list could not be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 197

• Message text: Type of case expression in selection list could not be determined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS197 - Type of case expression in selection list could not be determined ?

  The SAP error message DDLS197 ("Type of case expression in selection list could not be determined") typically occurs in ABAP when there is an issue with the CASE statement in your code. This error indicates that the ABAP compiler is unable to determine the data type of the expressions used in the CASE statement.
  Causes:
  
  Inconsistent Data Types: The expressions in the CASE statement may have different data types, making it impossible for the compiler to determine a common type.
  Uninitialized Variables: If the variables used in the CASE statement are not initialized or declared properly, it can lead to this error.
  Complex Expressions: If the expressions are too complex or involve different types of operations, the compiler may struggle to infer the type.
  Use of Non-Scalar Types: If you are using non-scalar types (like structures or internal tables) in the CASE statement, it can lead to this error.
  
  Solutions:
  
  
  Ensure Consistent Data Types: Make sure that all the expressions in the CASE statement are of the same data type. If necessary, use type conversion functions to ensure consistency.
  DATA: lv_value TYPE i.
  CASE lv_value.
    WHEN 1.
      " Do something
    WHEN 2.
      " Do something else
    WHEN OTHERS.
      " Handle other cases
  ENDCASE.
  
  
  Initialize Variables: Ensure that all variables used in the CASE statement are properly declared and initialized before they are used.
  
  
  Simplify Expressions: If you are using complex expressions, try breaking them down into simpler components or variables that have a clear and consistent type.
  
  
  Use Scalar Types: Ensure that you are using scalar types (like integers, characters, etc.) in the CASE statement rather than complex types.
  
  
  Check for Syntax Errors: Review the syntax of your CASE statement to ensure there are no typographical errors or misplaced keywords.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on the CASE statement and data types.
  Debugging: Use the ABAP debugger to step through your code and inspect the types of the variables involved in the CASE statement.
  SAP Community: Engage with the SAP Community forums for additional insights and solutions from other developers who may have encountered similar issues.
  
  By addressing the above points, you should be able to resolve the DDLS197 error in your ABAP code.