How To Fix /PM0/ABQ_MIG_MSG071 - Cannot compare without creating a copy

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ABQ_MIG_MSG -

• Message number: 071

• Message text: Cannot compare without creating a copy

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ABQ_MIG_MSG071 - Cannot compare without creating a copy ?

  The SAP error message /PM0/ABQ_MIG_MSG071 Cannot compare without creating a copy typically occurs in the context of data migration or transformation processes, particularly when using the SAP Advanced Business Application Programming (ABAP) language. This error indicates that there is an attempt to compare two data objects that cannot be directly compared without first creating a copy of one of the objects.
  Cause:
  
  Data Object Types: The error often arises when you are trying to compare two data objects of incompatible types or structures. For example, comparing a complex data structure (like a table or a structure) directly without creating a copy can lead to this error.
  Memory Management: In ABAP, certain operations require that data be copied to ensure that the original data remains unchanged during the comparison. If the system detects that a direct comparison could lead to unintended side effects, it raises this error.
  Internal Logic: The logic in the program may not be handling the data types correctly, leading to an attempt to compare objects that are not directly comparable.
  
  Solution:
  
  
  Create a Copy: Modify the code to create a copy of the data object before performing the comparison. This can be done using the MOVE-CORRESPONDING statement or similar methods to ensure that the data is safely duplicated.
  Example:
  DATA: lv_copy TYPE your_data_type.
  lv_copy = your_data_object.
  IF lv_copy = your_other_data_object.
      " Your logic here
  ENDIF.
  
  
  Check Data Types: Ensure that the data types of the objects being compared are compatible. If they are not, consider converting them to a common type before comparison.
  
  
  Review Logic: Review the logic of your program to ensure that comparisons are being made in a valid context. This may involve restructuring your code to avoid direct comparisons of incompatible types.
  
  
  Debugging: Use debugging tools in SAP to trace the execution of your program and identify the exact point where the error occurs. This can help you understand the data types involved and how to resolve the issue.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on data types and memory management.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or solutions.
  
  By following these steps, you should be able to resolve the error and ensure that your comparisons are performed correctly in your SAP environment.