How To Fix 37564 - Only one of two elements & is in the loop (cannot be tranformed)

SAP Error Message - Details

• Message type: E = Error

• Message class: 37 - Screen Painter

• Message number: 564

• Message text: Only one of two elements & is in the loop (cannot be tranformed)

In the selected area, which is part of a loop block, you attempted to
convert screen fields to checkboxes or radio buttons.
Two screen elements exist for the specified field name - a template
(input/output field) and a field text. Of these, one lies inside the
loop block and the other outside.

System Response

The conversion was rejected because the field text with a button as
graphical element must form a unit and a graphical unit cannot lie
partly inside and partly outside a loop.

How to fix this error?

First, give the template or the field text a different name.
If you want to use the text field as a template header (i.e. as a
textual explanation for the intended checkbox or radio button), you
should prefix the name of the field text with an asterisk ('*').
Fields with names where the only difference is an asterisk as prefix
are treated the same at runtime for the F1 help. This means that, when
you define F1 documentation for the data element, it becomes effective
for the header.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 37564 - Only one of two elements & is in the loop (cannot be tranformed) ?

  The SAP error message 37564, which states "Only one of two elements & is in the loop (cannot be transformed)," typically occurs in the context of SAP ABAP programming, particularly when dealing with internal tables and loops. This error indicates that there is an issue with the way elements are being processed in a loop, specifically that only one of the two expected elements is present.
  Cause:
  
  Loop Structure: The error often arises when you are trying to loop through an internal table that is expected to contain two related elements, but only one of them is present. This can happen if the data is not structured correctly or if there is a mismatch in the expected data format.
  Data Inconsistency: The data being processed may not be consistent, meaning that the expected pairs of elements are not available in the internal table.
  Incorrect Logic: There may be a logical error in the code that leads to the situation where only one of the two elements is being populated or processed.
  
  Solution:
  
  Check Data Structure: Ensure that the internal table you are looping through is correctly populated with the expected data. Verify that both elements are present in the data structure.
  Debugging: Use debugging tools to step through the code and inspect the contents of the internal table before the loop. This will help you identify if the data is as expected.
  Conditional Logic: Implement conditional checks to ensure that both elements are present before attempting to process them in the loop. You can use IF statements to check for the existence of both elements.
  Data Preparation: If the data is being fetched from a database or another source, ensure that the query or data retrieval logic is correctly set up to fetch both elements.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for more details on internal tables and loop constructs.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  Error Handling: Consider implementing error handling in your code to gracefully manage situations where data may not be as expected.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.