You cannot use this function in modification mode for original element &

What causes this issue?

You are working in the Screen Painter under the Modification Assistant
and have selected a screen element. You wanted to use a function that:
Changes the type of the element
Example: Converting a checkbox into a radio button.
Changes the assignment of the element to a graphical element
(container)
Example: Converting to a step loop.
Deletes the screen element
Under the Modification Assistant, these actions are only allowed for
screen elements that are not SAP original elements.
However, the element that you selected is an original element.

System Response

Operation canceled.

How to fix this error?

If you want to:
Change the type of the origianal element, or
Change the assignment of an original element to a graphical element
(container),
you must do it without the Modification Assistant. You can do this by
choosing Edit -> Modification -> Switch off assistant.
You should, however, be certain that this change is really necessary,
and consider the possible consequences in the screen flow logic.
You must also switch off the Modification Assistant if you want to
delete an original element. In most cases, you do not need to delete
the original element. Instead, you can reduce its size or make it
invisible.
To make a screen element invisible at runtime, set the "Invisible"
display attribute. In this case, values are still transported from the
program to the screen at runtime, so the danger of unwanted changes is
much less.
You can set the display attribute to "invisible" within the PROCESS
BEFORE OUTPUT
for the column col_name of the table controls tc_name

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

TYPE-POOLS: cxtab.
DATA: col_wa TYPE cxtab_column.
READ TABLE tc_name-cols WITH KEY screen-name = 'COL_NAME'
INTO col_wa.
col_wa-invisible = '1'.
MODIFY tc_name-cols FROM col_wa INDEX sy-tabix.
fnr alle anderen elementaren Dynproelemente durch
LOOP AT screen WHERE name = 'COL_NAME'.
screen-invisible = '1'.
MODIFY screen.
ENDLOOP.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.