GL Creation BDC.

Dear all,

I made a GL creation bdc.In which i used two functional modules:-

CALL FUNCTION 'F4_FILENAME'

     EXPORTING

*     PROGRAM_NAME  = SYST-CPROG

*     DYNPRO_NUMBER = SYST-DYNNR

       FIELD_NAME    = 'P_FILE'

     IMPORTING

       FILE_NAME     = P_FILE.

CALL FUNCTION 'TEXT_CONVERT_XLS_TO_SAP'

     EXPORTING

*     I_FIELD_SEPERATOR    =

*     I_LINE_HEADER        =

       I_TAB_RAW_DATA       = IT_TYPE

       I_FILENAME           = P_FILE

     TABLES

       I_TAB_CONVERTED_DATA = IT_GL[]

     EXCEPTIONS

       CONVERSION_FAILED    = 1

       OTHERS               = 2.

when i execute this program the SY-SUBRC=4.How can i solve this problem?

Regards:-

Prashant Sharma.