even I used below code also at end of my present code, still same error.
REPLACEALL OCCURRENCES OF cl_abap_char_utilities=>cr_lf INresultWITH' '.
REPLACEALL OCCURRENCES OF cl_abap_char_utilities=>horizontal_tab INresultWITH' '.
REPLACEALL OCCURRENCES OF cl_abap_char_utilities=>vertical_tab INresultWITH' '.
REPLACEALL OCCURRENCES OF cl_abap_char_utilities=>newline INresultWITH' '.
REPLACEALL OCCURRENCES OF cl_abap_char_utilities=>form_feed INresultWITH' '.
REPLACEALL OCCURRENCES OF cl_abap_char_utilities=>backspace INresultWITH' '.