Below is the code snippet  to display error message, in report after selection of data.

Normal type 'E' report prevent user to back to original selection screen.

IF ta_report[] IS NOT INITIAL.
    PERFORM display_report.
ELSE.
    MESSAGE s000(zfi01) WITH  'Data Does Not Exists' DISPLAY LIKE 'E'.
    LEAVE LIST-PROCESSING.
ENDIF.

Serkan AKKAVAK
Computer Engineer
serkurumsal@yandex.com