Check whether a file is existing or not on pc

REPORT ZVENKATTEST.

data: file_exists TYPE XFLAG .

parameters:p_file like rlgrap-filename .


at selection-screen on value-request for p_file .

CALL FUNCTION 'F4_FILENAME'
EXPORTING
PROGRAM_NAME = SYST-CPROG
DYNPRO_NUMBER = SYST-DYNNR
FIELD_NAME = 'P_FILE'
IMPORTING
FILE_NAME = p_file
.
start-of-selection .

CALL FUNCTION 'DX_FILE_EXISTENCE_CHECK'
EXPORTING
FILENAME = p_file
PC = 'X'
IMPORTING
FILE_EXISTS = FILE_EXISTS
EXCEPTIONS
RFC_ERROR = 1
FRONTEND_ERROR = 2
NO_AUTHORITY = 3
OTHERS = 4
.
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.

if FILE_EXISTS = 'X'.
write:/ 'FILE EXISTS' .
else .
write:/ 'FILE doesnt EXISTS' .
endif.