How To Fix WER138 - Type &1 is not a structure type

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 138

• Message text: Type &1 is not a structure type

Self-Explanatory Message

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• What is the cause and solution for SAP error message WER138 - Type &1 is not a structure type ?

  SAP Error Message:
  
  WER138 Type &1 is not a structure type
  
  Cause:
  This error occurs when the ABAP program or dictionary object expects a structure type, but the specified type (&1 is a placeholder for the actual type name) is not defined as a structure. Instead, it might be a data element, domain, table type, or some other non-structure type.
  For example, if you try to declare a variable or use a type that is expected to be a structure (like in a TYPES or DATA statement) but the referenced type is a simple data element or a table type, the system raises this error.
  
  Typical Scenarios:
  
  Using a data element or domain where a structure type is required.
  Using a table type or elementary type instead of a structure.
  Incorrect type reference in TYPES, DATA, or FIELD-SYMBOLS declarations.
  Trying to access components of a type that is not a structure.
  
  
  Solution:
  
  
  Check the Type Definition:
  
  Go to transaction SE11 (Data Dictionary).
  Enter the type name mentioned in the error message.
  Verify if it is defined as a structure.
  
  
  
  Correct the Type Usage:
  
  If the type is not a structure but you need a structure, either:
  
  Use the correct structure type.
  Create a new structure type that fits your needs.
  
  
  
  
  
  Adjust the Code:
  
  If you intended to use a data element or domain, do not treat it as a structure.
  If you want to access components, ensure the type is a structure.
  
  
  
  Example Fix:
  TYPES: BEGIN OF ty_structure,
           field1 TYPE i,
           field2 TYPE c LENGTH 10,
         END OF ty_structure.
  
  DATA: ls_data TYPE ty_structure.
  Instead of:
  TYPES ty_wrong TYPE i. " 'i' is an elementary type, not a structure
  DATA: ls_data TYPE ty_wrong. " This will cause WER138
  
  
  
  Related Information:
  
  Message Class: WER (Workbench Errors)
  Message Number: 138
  Transaction SE11: To check and create data types and structures.
  ABAP Documentation: Look for "Data Types" and "Structures" in ABAP keyword documentation.
  Common ABAP Statements Involved: TYPES, DATA, FIELD-SYMBOLS, FIELD-SYMBOLS <fs> TYPE <type>, MOVE-CORRESPONDING, etc.
  
  
  Summary:
  
  WER138 means the specified type is not a structure.
  Verify the type definition in SE11.
  Use or create a proper structure type.
  Adjust your ABAP code accordingly.
  
  
  If you provide the exact code snippet or type name, I can help you pinpoint the issue more precisely.