How To Fix 28102 - Variable declaration for object expected

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 102

• Message text: Variable declaration for object expected

What causes this issue?

The syntax check found an error in the definition of an abbreviated
characteristic-specific name, or a preceding declaration was not closed
correctly.

System Response

The cursor shows where the error occurs.

How to fix this error?

In the constraint header (keyword OBJECTS:), definitions of
characteristic-specific variables are expected after the keyword WHERE
or after a semicolon (';'). For example:
OBJECTS:
?T IS_A POST
WHERE ?L = LENGTH ;
?C = COLOR
At the cursor, no correct variable declaration was found. Correct the
variable declaration or the preceding declarations.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28102 - Variable declaration for object expected ?

  The SAP error message 28102, "Variable declaration for object expected," typically occurs in ABAP (Advanced Business Application Programming) when the system encounters a situation where it expects a variable declaration for an object but does not find one. This can happen for various reasons, often related to syntax errors or incorrect usage of object-oriented programming concepts in ABAP.
  Causes:
  
  
  Missing Variable Declaration: The most common cause is that a variable has not been declared before it is used. In ABAP, all variables must be declared before they can be referenced.
  
  
  Incorrect Object Usage: If you are trying to use an object without properly declaring it or if the object type is not recognized, this error can occur.
  
  
  Scope Issues: The variable might be declared in a different scope (e.g., within a method or a different class) and is not accessible in the current context.
  
  
  Typographical Errors: Simple typos in variable names or object types can lead to this error.
  
  
  Incompatible Types: Trying to assign or use a variable of an incompatible type can also trigger this error.
  
  
  Solutions:
  
  
  Declare the Variable: Ensure that all variables are declared before they are used. For example:
  DATA: my_object TYPE REF TO my_class.
  
  
  Check Object Types: Verify that the object types you are using are correctly defined and that you are referencing the correct class or interface.
  
  
  Scope Verification: Make sure that the variable is declared in the correct scope. If it is declared in a method, ensure you are using it within that method or passing it correctly to other methods.
  
  
  Review Syntax: Check for any typographical errors in your code. Ensure that variable names are spelled correctly and that you are using the correct syntax for object-oriented programming in ABAP.
  
  
  Use the ABAP Editor: Utilize the ABAP editor's syntax check feature (Ctrl + F2) to identify any syntax errors or issues in your code.
  
  
  Debugging: If the error persists, consider using the debugger to step through your code and identify where the variable is expected but not found.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for ABAP programming to understand variable declarations and object-oriented programming concepts.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other developers who may have encountered similar issues.
  Code Examples: Look for code examples that demonstrate proper variable declaration and object usage in ABAP.
  
  By following these guidelines, you should be able to resolve the error message 28102 and ensure that your ABAP code is functioning correctly.