How To Fix WL136 - Expression type & is not supported

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 136

• Message text: Expression type & is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WL136 - Expression type & is not supported ?

  The SAP error message WL136, which states "Expression type & is not supported," typically occurs in the context of ABAP programming, particularly when working with expressions in the context of data types that are not compatible with the operation being performed.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Incompatible Data Types: The expression you are trying to evaluate involves data types that cannot be used together. For example, trying to perform arithmetic operations on a string or using a non-numeric type in a numeric context.
  Unsupported Operations: Certain operations may not be supported for specific data types. For instance, using a method or function that is not applicable to the type of variable you are working with.
  Incorrect Type Casting: If you are trying to cast or convert a variable to a type that is not compatible, this error may occur.
  
  Solution:
  To resolve the WL136 error, you can take the following steps:
  
  
  Check Data Types: Review the data types of the variables involved in the expression. Ensure that they are compatible with the operation you are trying to perform.
  
  Use the DESCRIBE FIELD statement to check the type of a variable.
  Ensure that numeric operations are performed on numeric types (e.g., integers, floats).
  
  
  
  Type Casting: If necessary, explicitly cast or convert variables to the appropriate type before performing operations. Use functions like CONVERT or CAST as needed.
  
  
  Review Documentation: Consult the SAP documentation for the specific functions or methods you are using to ensure they are applicable to the data types involved.
  
  
  Debugging: Use the ABAP debugger to step through your code and inspect the values and types of variables at runtime. This can help identify where the type mismatch occurs.
  
  
  Refactor Code: If the expression is complex, consider breaking it down into simpler parts or using intermediate variables to clarify the types being used.
  
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the various data types in ABAP, such as elementary types (like I, F, C, D, etc.) and complex types (like structures and internal tables).
  SAP Notes: Check SAP Notes for any known issues or updates related to the WL136 error. Sometimes, specific versions of SAP may have bugs that are documented in SAP Notes.
  Community Forums: Engage with the SAP community forums or Stack Overflow for additional insights and solutions from other developers who may have encountered the same issue.
  
  By following these steps, you should be able to identify the cause of the WL136 error and implement a suitable solution.