Hi,
i too got the same problem and got the solution for that.
code:
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.
PERFORM file_browse.
PERFORM file_upload. " Files into internal table before start of selection event
AT SELECTION-SCREEN OUTPUT.
DATA: exclude LIKE rsexfcode OCCURS 0 WITH HEADER LINE,
ls_submit_info TYPE rssubinfo.
START-OF-SELECTION.
PERFORM process_data.
FORM file_upload .
DATA ip_file TYPE string.
CLEAR ip_file.
REFRESH it_data.
ip_file = p_file.
CALL FUNCTION 'GUI_UPLOAD'
EXPORTING
filename = ip_file " Path of the file
has_field_separator = 'X'
TABLES
data_tab = it_data
EXCEPTIONS
file_open_error = 1
file_read_error = 2
no_batch = 3
gui_refuse_filetransfer = 4
invalid_type = 5
no_authority = 6
unknown_error = 7
bad_data_format = 8
header_not_allowed = 9
separator_not_allowed = 10
header_too_long = 11
unknown_dp_error = 12
access_denied = 13
dp_out_of_memory = 14
disk_full = 15
dp_timeout = 16
OTHERS = 17.
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
***Using this concept" Export into another variable
REFRESH: exp_data.
exp_data = it_data.
*Index key is group of Report & UserId.
CONCATENATE sy-repid sy-uname INTO indxkey .
EXPORT exp_data FROM exp_data
TO DATABASE mcdx(zb) FROM wa_indx ID indxkey.
ENDFORM. "file_upload
****import into start of selection
FORM process_data .
IF sy-batch EQ 'X'.
REFRESH it_data.
CONCATENATE sy-repid sy-uname INTO indxkey .
IMPORT exp_data = exp_data FROM DATABASE mcdx(zb) ID indxkey.
it_data = exp_data.
ENDIF.
IF it_data IS NOT INITIAL.
LOOP AT it_data INTO wa_data.
wa_bapi_data-payer_code = ''.
wa_bapi_data-labr_value = wa_data-labr_value.
wa_bapi_data-plant = wa_data-plant.
wa_bapi_data-text = wa_data-text.
wa_bapi_data-dealer_code = wa_data-dealer_code.
wa_bapi_data-claim_mnth = wa_data-claim_mnth.
wa_bapi_data-claim_yr = wa_data-claim_yr.
wa_bapi_data-dr_cr_indicator = wa_data-dr_cr_indicator.
APPEND wa_bapi_data TO it_bapi_data.
ENDLOOP.
ELSE.
MESSAGE:'No entry found' TYPE 'E'.
ENDIF.
ENDFORM. "
I think you get the correct answer. 
Regards,
Ankita Jain