Error while opening the XML file

Question

Hi all,
i'am trying to download data from internal table to XML file with root node and its
corresponding child nodes.i have written the program in this way.
tables: mara.
include bcciixml_decl.
include bcciixml_impl.
parameters: p_matnr like mara-matnr.
start-of-selection.
data: piXML          type ref to if_ixml,
        pDocument      type ref to if_ixml_document,
        pStreamFactory type ref to if_ixml_stream_factory,
        pIStream       type ref to if_ixml_istream,
        pParser        type ref to if_ixml_parser,
        pNode          type ref to if_ixml_node,
        pText          type ref to if_ixml_text,
        string         type string,
        count          type i,
        index          type i,
        totalSize      type i,
        dsn(40)        type C,
        xstr           type xstring.
  types: begin of it_mara,
            matnr like mara-matnr,
            ernam like mara-ernam,
            aenam like mara-aenam,
            vpsta like mara-vpsta,
        end of it_mara.
data: itab_mara type table of it_mara.
select matnr ernam aenam vpsta from mara into table itab_mara where
       matnr =  p_matnr.
types: begin of xml_line,
        data(256) type X,
      end of xml_line.
data: xml_table type table of xml_line.
parameters: filename like rlgrap-filename.
pixml = cl_ixml=>create( ).
*-- create the initial document
  pDocument = pixml->create_document( ).
  pStreamFactory = pixml->create_stream_factory( ).
*-- create an input stream for the table
*pIStream = pStreamFactory->create_istream_itable( table = xml_table
                                                 size  = totalSize ).
  pParser = piXML->create_parser( stream_factory = pStreamFactory
                                  istream        = pIStream
                                  document       = pDocument ).
data: pOStream type ref to if_ixml_ostream.
pOStream = pStreamFactory->create_ostream_itable( table = xml_table ).
call method pDocument->render( ostream   = pOStream ).
*-- how many bytes were written to the table?
totalSize = pOStream->get_num_written_raw( ).
*-- write the XML document back to the frontend
concatenate filename '.out' into filename.
condense filename no-gaps.
CALL FUNCTION 'WS_DOWNLOAD'
     EXPORTING
          BIN_FILESIZE            = totalSize
          FILENAME                = filename
          FILETYPE                = 'BIN'
     TABLES
          DATA_TAB                = itab_mara
     EXCEPTIONS
          OTHERS                  = 11
IF SY-SUBRC <> 0.
ENDIF.
*-- print the whole DOM tree as a list...
pNode = pDocument.
perform print_node using pNode.
      FORM print_node                                               *
form print_node using value(pNode) type ref to if_ixml_node.
  data: indent      type i.
  data: pText       type ref to if_ixml_text.
  data: string      type string.
  indent  = pNode->get_height( ) * 2.
  case pnode->get_type( ).
    when if_ixml_node=>co_node_element.
      string = pNode->get_name( ).
      write: at /indent '<', string, '> '.
    when if_ixml_node=>co_node_text.
       pText ?= pNode->query_interface( ixml_iid_text ).
       if pText->ws_only( ) is initial.
        string = pNode->get_value( ).
        write: at /indent string.
       endif.
  endcase.
  pNode = pNode->get_first_child( ).
  while not pNode is initial.
     perform print_node using pNode.
     pNode = pNode->get_next( ).
  endwhile.
endform.
but when open the XML file which i created on the desktop it shows the following error.
The XML page cannot be displayed
Cannot view XML input using style sheet. Please correct the error and then click the Refresh button, or try again later.
XML document must have a top level element. Error processing resource 'file:///C:/Documents and Settings/anilda/Desktop/sim...
how to rectify this error.
Regards,
satish.

Answer 1

You are going to need to provide more details about this shell script file you are executing and the environment it is in. Beyond being on a Windows box, you have provided none of those details.
If the SQL statement will execute cleanly in SQLDeveloper but not your script, then the issue lies in the script. How do you know the error is that SQL statement? Can your script even "select * from dual;" successfully?
Also, SQLDeveloper (which I don't use) may contain its own libraries for accessing the DB. You probably should consider upgrading to a SQL*Plus client that is at least the same version or later as your database.
Note:
As I recall, xmlgen in 9.2 is now a synonym for dbms_xmlgen. You should change the package name accordingly [url http://docs.oracle.com/cd/B10501_01/appdev.920/a96612/d_xmlge2.htm#1010709]dbms_xmlgen.getXML