Message type: E = Error
Message class: OO - Class Builder/API
Message number: 155
Message text: Invalid declaration type. Use 'Attribute', 'Class Attribute', 'Constant'
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OO155
- Invalid declaration type. Use 'Attribute', 'Class Attribute', 'Constant' ?The SAP error message OO155 "Invalid declaration type" typically occurs in ABAP Object-Oriented programming when there is an issue with the declaration of attributes or constants in a class. This error indicates that the declaration type used is not valid or not recognized by the ABAP compiler.
Cause: The error can arise from several scenarios, including: Incorrect Declaration Type: You may have used an invalid keyword for declaring an attribute or constant. For example, using DATA instead of ATTRIBUTE or CLASS-DATA instead of CLASS ATTRIBUTE. Scope Issues: If you are trying to declare an attribute or constant in a context where it is not allowed (e.g., inside a method instead of the class definition). Syntax Errors: There may be syntax errors in the declaration line that prevent the compiler from recognizing the declaration type.
Solution: To resolve the OO155 error, you can follow these steps: Check Declaration Syntax: Ensure that you are using the correct keywords: Use ATTRIBUTE for instance
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