How To Fix WL124 - Conversion from ABAP type & to ABAP type & is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 124

• Message text: Conversion from ABAP type & to ABAP type & is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WL124 - Conversion from ABAP type & to ABAP type & is not supported ?

  The SAP error message WL124, which states "Conversion from ABAP type & to ABAP type & is not supported," typically occurs when there is an attempt to convert data between incompatible ABAP types. This can happen in various scenarios, such as when working with data types in ABAP programs, function modules, or when using certain SAP transactions.
  Cause:
  
  Incompatible Data Types: The error usually arises when there is an attempt to assign or convert a value from one data type to another that is not compatible. For example, trying to assign a string to a numeric field or vice versa.
  Custom Data Types: If you are using custom-defined data types or structures, there may be a mismatch in the expected types.
  Function Module or Method Calls: If you are passing parameters to a function module or method that expects a different data type than what is being provided, this error can occur.
  
  Solution:
  
  Check Data Types: Review the data types involved in the operation that triggered the error. Ensure that the source and target types are compatible.
  Type Conversion: If necessary, perform explicit type conversion using ABAP conversion functions or statements. For example, you can use CONCATENATE, CAST, or other conversion functions to ensure the data types match.
  Debugging: Use the ABAP debugger to trace the execution of the program and identify where the incompatible types are being used. This can help pinpoint the exact location of the error.
  Review Function Module/Method Signatures: If the error occurs during a function call, check the parameter types in the function module or method signature to ensure they match the types you are passing.
  Consult Documentation: If you are using standard SAP function modules or methods, refer to the SAP documentation to understand the expected data types.
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the various ABAP data types (e.g., CHAR, NUMC, INT, STRING, etc.) and their compatibility.
  Type Conversion Functions: Explore ABAP type conversion functions such as CONVERT, CAST, and others that can help in converting between types.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message WL124, as there may be specific fixes or recommendations provided by SAP.
  
  By following these steps, you should be able to identify the cause of the WL124 error and implement a suitable solution.