In standard report RM07DOCS , when executed it gets into dump.
The error is
" Error at assignment: Overwritten protected field."
CODE:
LOOP AT rtt WHERE color <> space.
CONCATENATE 'LIST-' rtt-fieldname INTO fname.
linecolor-fieldname = rtt-fieldname.
linecolor-color-int = 0.
CASE list-shkzg.
WHEN 'S'. linecolor-color-col = 5.
WHEN 'H'.
linecolor-color-col = 6.
IF rtt-color = '-'.
ASSIGN (fname) TO <f>.
<f> = 0 - <f>.
ENDIF.
ENDCASE.
APPEND linecolor.
ENDLOOP.
ERROR AT <F> = 0 - <F>
PLEASE HELP ME TO SOLVE THIS ISSUE.