Error In EP RFC IVIEW

Question

Dear Experts,
While executing a FM in EP RFC Iview I am getting this error. Can Anyone Help.
Function execution failed.
Exception message: Nested Exception.
Failure to execute native function. Connection Failed: Nested Exception.
Native connection to the back end system is broken.
Thanks & Regards
Rajiv Roshan

Answer 1

Whatever You have said is done.
Actually I want to open Microsoft Excel in EP. For this I created an RFC IView and there I am calling my RFC. The RFC name and parameters are coming fine. But While previewing I am getting this Error.
In The RFC I have written The following Code:
CALL METHOD cl_gui_frontend_services=>execute
  EXPORTING
    DOCUMENT               = iv_file
   APPLICATION            =
   PARAMETER              =
   DEFAULT_DIRECTORY      =
   MAXIMIZED              =
   MINIMIZED              =
   SYNCHRONOUS            =
    OPERATION              = 'OPEN'
  EXCEPTIONS
    CNTL_ERROR             = 1
    ERROR_NO_GUI           = 2
    BAD_PARAMETER          = 3
    FILE_NOT_FOUND         = 4
    PATH_NOT_FOUND         = 5
    FILE_EXTENSION_UNKNOWN = 6
    ERROR_EXECUTE_FAILED   = 7
    SYNCHRONOUS_FAILED     = 8
    NOT_SUPPORTED_BY_GUI   = 9
    others                 = 10
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
            WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
In Iv_file if we give 'Excel' in R/3 it opens a new Excel Sheet, but in EP it is giving that error.