How To Fix 37078 - Selection overlaps with loop lines

SAP Error Message - Details

• Message type: E = Error

• Message class: 37 - Screen Painter

• Message number: 078

• Message text: Selection overlaps with loop lines

What causes this issue?

You have chosen either the <LS>Select block end</> function, in order
to extend a block, or a box where all the screen elements are selected.
This block contains parts which belong to a loop block and some which
do not. This kind of overlapping is not allowed.

How to fix this error?

The block can either contain no loop elements or it must lie completely
within the first loop block, but not in any loop repetition lines.
If you want to move or delete an entire loop area, place the cursor in
the loop area and select the <LS>Loop</> function.
If you want to move or delete a box containing a loop area, you must
move the box and the loop area separately. You can process a box on its
own (i.e. without the elements it contains) by placing the cursor on
any character of the box edge and choosing the <LS>Graphical element</>
function.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 37078 - Selection overlaps with loop lines ?

  The SAP error message "37078: Selection overlaps with loop lines" 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 data is being selected or processed within a loop, leading to a conflict or overlap in the data being handled.
  Cause:
  The error arises when you attempt to select data from an internal table while simultaneously processing that same table in a loop. This can happen if:
  
  You are trying to read or modify the internal table while iterating over it.
  The selection criteria for the data retrieval overlaps with the current loop iteration, causing ambiguity in the data being processed.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Avoid Modifying the Table in the Loop: Ensure that you are not modifying the internal table (e.g., adding or deleting entries) while you are looping through it. If you need to modify the table, consider creating a copy of the table before the loop.
  
  
  Use a Separate Internal Table for Selection: If you need to select data based on certain criteria, do this outside of the loop. Store the results in a separate internal table and then process that table in the loop.
  
  
  Check Loop Logic: Review the logic of your loop to ensure that it does not inadvertently overlap with the selection criteria. Make sure that the loop is not trying to access data that is being modified or selected at the same time.
  
  
  Use Proper Control Structures: If you need to perform operations that require both looping and selection, consider using control structures like READ TABLE or LOOP AT ... WHERE to filter data without causing overlaps.
  
  
  Example:
  Here’s a simple example to illustrate the issue and a potential solution:
  Problematic Code:
  DATA: lt_table TYPE TABLE OF your_structure,
        lv_value TYPE your_field_type.
  
  LOOP AT lt_table INTO DATA(ls_row).
    " This selection overlaps with the loop
    SELECT SINGLE field INTO lv_value FROM your_table WHERE condition = ls_row-field.
    " Process the row
  ENDLOOP.
  Corrected Code:
  DATA: lt_table TYPE TABLE OF your_structure,
        lt_selected TYPE TABLE OF your_structure,
        lv_value TYPE your_field_type.
  
  " Perform selection outside the loop
  SELECT * INTO TABLE lt_selected FROM your_table WHERE condition IN (SELECT field FROM lt_table).
  
  LOOP AT lt_table INTO DATA(ls_row).
    " Now process lt_selected or use ls_row without overlap
  ENDLOOP.
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for best practices on handling internal tables and loops.
  Debugging: Use the ABAP debugger to step through your code and identify where the overlap occurs.
  SAP Community: Engage with the SAP Community forums for additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these guidelines, you should be able to resolve the "37078: Selection overlaps with loop lines" error effectively.