How To Fix SMT079 - Parameters of type data reference cannot be combined with fixed values

SAP Error Message - Details

• Message type: E = Error

• Message class: SMT -

• Message number: 079

• Message text: Parameters of type data reference cannot be combined with fixed values

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SMT079 - Parameters of type data reference cannot be combined with fixed values ?

  The SAP error message SMT079 indicates that there is an issue with the way data references are being used in your ABAP code. Specifically, this error occurs when you attempt to combine a data reference with fixed values in a way that is not allowed by the ABAP language rules.
  Cause:
  The error typically arises in the following scenarios:
  
  Data Reference Usage: You are trying to use a data reference (a pointer to a data object) in a context where a fixed value (like a literal or a constant) is expected.
  Incorrect Syntax: The syntax used to combine the data reference with fixed values is incorrect, leading to a type mismatch.
  
  Example:
  For instance, if you have a data reference and you try to concatenate it with a string literal directly, you might encounter this error.
  DATA: ref TYPE REF TO data,
        result TYPE string.
  
  CREATE DATA ref TYPE string.
  result = ref && 'some fixed value'.  " This will cause SMT079
  Solution:
  To resolve this error, you need to ensure that you are using the data reference correctly. Here are some steps you can take:
  
  
  Dereference the Data Reference: If you want to use the value pointed to by the data reference, you need to dereference it first. You can do this using the ^ operator.
  DATA: ref TYPE REF TO data,
        result TYPE string.
  
  CREATE DATA ref TYPE string.
  result = ref->* && 'some fixed value'.  " Correct usage
  
  
  Check Data Types: Ensure that the data types you are working with are compatible. If you are trying to concatenate or combine different types, make sure they are of the same type or can be implicitly converted.
  
  
  Use Appropriate Methods: If you are working with complex data types or structures, consider using methods or functions that are designed to handle data references properly.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on data references and their usage.
  Data Types in ABAP: Understanding the different data types and how they interact can help prevent such errors.
  Debugging: Use the ABAP debugger to step through your code and inspect the values and types of variables at runtime, which can help identify where the error is occurring.
  
  By following these guidelines, you should be able to resolve the SMT079 error and ensure that your ABAP code is functioning correctly.