How To Fix 42129 - Comparison contexts are the same

SAP Error Message - Details

• Message type: E = Error

• Message class: 42 - Information Workbench

• Message number: 129

• Message text: Comparison contexts are the same

What causes this issue?

The comparison contexts are the same.
Select two different contexts when comparing info objects.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter a different comparison context.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 42129 - Comparison contexts are the same ?

  The SAP error message 42129, "Comparison contexts are the same," typically occurs in the context of ABAP programming when there is an attempt to compare two structures or fields that are not supposed to be compared due to their context being identical. This can happen in various scenarios, such as when using the IF statement or in a loop where the same context is being referenced multiple times.
  Cause:
  The error arises when the ABAP runtime detects that the comparison being made is between two contexts that are identical. This can happen in the following situations:
  
  Comparing two fields or structures that are from the same source or context.
  Using the same variable in a comparison without any modification or change in context.
  Logical errors in the code where the programmer intended to compare different contexts but mistakenly referenced the same one.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Code: Check the lines of code where the comparison is being made. Ensure that you are not inadvertently comparing the same variable or structure.
  
  
  Modify the Comparison: If you intended to compare different contexts, ensure that you are referencing the correct variables or structures. You may need to create a copy of the variable or use a different variable altogether.
  
  
  Debugging: Use the ABAP debugger to step through the code and observe the values and contexts of the variables being compared. This can help identify where the logic is failing.
  
  
  Refactor Logic: If the comparison is part of a loop or conditional statement, consider refactoring the logic to ensure that the contexts being compared are indeed different.
  
  
  Consult Documentation: If you are unsure about the specific contexts or structures, refer to the SAP documentation or the data dictionary to understand the definitions and relationships of the fields involved.
  
  
  Related Information:
  
  ABAP Documentation: Familiarize yourself with ABAP programming concepts, especially regarding data types, structures, and comparison operations.
  SAP Community: Engage with the SAP community forums or support channels for additional insights or similar experiences from other developers.
  Error Handling: Implement proper error handling in your ABAP code to catch such issues early in the development process.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.