How To Fix WL133 - A multiline element cannot be assigned to the single-line element &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 133

• Message text: A multiline element cannot be assigned to the single-line element &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WL133 - A multiline element cannot be assigned to the single-line element & ?

  The SAP error message WL133 indicates that there is an attempt to assign a multiline element (such as a table or a structure with multiple lines) to a single-line element (like a single variable or field). This typically occurs in the context of ABAP programming when you are trying to assign a data structure that contains multiple entries to a variable that is designed to hold only a single entry.
  Cause:
  
  Data Type Mismatch: You are trying to assign a table or a structure that contains multiple records to a variable that is defined to hold only a single record.
  Incorrect Logic: The logic in your code may be incorrect, leading to an attempt to assign a collection of data to a single variable.
  
  Solution:
  
  
  Check Data Types: Ensure that the variable you are assigning to is of the correct type. If you are trying to assign a table to a single variable, you need to either:
  
  Use a specific index to access a single entry from the table.
  Change the variable to a compatible type that can hold multiple entries (e.g., change a single structure to a table type).
  
  Example:
  DATA: lt_table TYPE TABLE OF your_structure,
        ls_single TYPE your_structure.
  
  " Correct assignment
  ls_single = lt_table[ 1 ].  " Assigning the first entry of the table to a single structure
  
  
  Review Logic: If the assignment is part of a loop or a conditional statement, ensure that you are correctly handling the data types and that you are not inadvertently trying to assign a whole table to a single variable.
  
  
  Debugging: Use the debugger to step through your code and inspect the data types and values being assigned. This can help you identify where the mismatch is occurring.
  
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with ABAP data types, especially the differences between single-line and multiline structures.
  SAP Documentation: Refer to the official SAP documentation for more details on data types and structures in ABAP.
  Error Handling: Implement error handling in your code to catch such issues early and provide meaningful messages to users or developers.
  
  By ensuring that your data types match and that your logic is sound, you can resolve the WL133 error effectively.