CALL TRANSFORMATION on Unicode WebAS 6.20: No valid source context supplied

Question

Hello,
in the last day's I was stuck into a strange problem. I had to develop a Web Service Client on our Web AS 6.20 Unicode system. I followed the Blog <a href="/people/durairaj.athavanraja/blog/2004/09/20/consuming-web-service-from-abap">Consuming Web Service from ABAP</a>. The problem was that my CALL TRANSFORMATION always throwed an exception "No valid source context supplied". I've tested the transformation with a local copy of the XML the Web Service returned and it works quite well. I had a look into the Documentaion of CALL TRANSFORMATION and it says:
== Documentation Quote Begin ==
Addition 3a
... SOURCE  XML sxml
Effect
Specification of the transformation source
Transfer the XML document sxml using addition 3a. The following three possibilities exist for specifiying sxml:
The XML document can be in an ABAP variable sxml of the type STRING or XSTRING or in an internal standard table sxml of the elementary line type C.
== Documentation Quote End ==
So there should be no difference between STRING and XSTRING. But there is a difference! Here is my testcase which I've derived from my Blog <a href="/people/gregor.wolf3/blog/2006/06/27/geocode-business-partner-with-google-maps">Geocode Business Partner with Google Maps</a>:
<b>XSLT Transformation - ZGOOGLE_GEOCODE_TO_ABAP</b>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:asx="http://www.sap.com/abapxml" xmlns:kml="http://earth.google.com/kml/2.0" version="1.0">
  <xsl:template match="/">
    <asx:abap version="1.0">
      <asx:values>
        <GEOCODE>
          <LON>
            <xsl:value-of select="substring-before(kml:kml/kml:Response/kml:Placemark/kml:Point/kml:coordinates,',')"/>
          </LON>
          <LAT>
            <xsl:value-of select="substring-before(substring-after(kml:kml/kml:Response/kml:Placemark/kml:Point/kml:coordinates,','),',')"/>
          </LAT>
          <ALT>
            <xsl:value-of select="substring-after(substring-after(kml:kml/kml:Response/kml:Placemark/kml:Point/kml:coordinates,','),',')"/>
          </ALT>
        </GEOCODE>
      </asx:values>
    </asx:abap>
  </xsl:template>
</xsl:transform>
<b>ABAP Report</b>
REPORT  z_gw_test_geocode.
DATA:
BEGIN OF geocode,
  lon TYPE string,
  lat TYPE string,
  alt TYPE string,
END OF geocode.
DATA: client TYPE REF TO if_http_client,
       url TYPE string,
       c_xml TYPE string,
       x_xml type xstring.
* Build URL to call Googe Maps Geocoding
CONCATENATE 'http://maps.google.com/maps/geo?'
  'q=Tacherting,+DE'
  '&output=xml'
  '&key=ABQIAAAA2WL-mG7HpdSjlxystL3uBhRvBuAcdiWwcJAQgt9kNvfse-yNqBQuxwHkHo31WjTJ_RzVPIhXNludVg'
  INTO url.
****Create the HTTP client
CALL METHOD cl_http_client=>create_by_url
  EXPORTING
    url    = url
  IMPORTING
    client = client
  EXCEPTIONS
    OTHERS = 1.
client->send( ).
client->receive( ).
****Get the response content in Character format
c_xml = client->response->get_cdata( ).
****Get the response content as Binary
x_xml = client->response->get_data( ).
****Transform XML as String to ABAP Values
DATA: xslt_err TYPE REF TO cx_xslt_exception,
      error_text TYPE string.
WRITE: / 'Transformation with STRING'.
TRY.
    CALL TRANSFORMATION zgoogle_geocode_to_abap
    SOURCE XML c_xml
    RESULT geocode = geocode.
  CATCH cx_xslt_exception INTO xslt_err.
    error_text = xslt_err->get_text( ).
    WRITE: / error_text.
ENDTRY.
WRITE: / 'LON: ', geocode-lon.
WRITE: / 'LAT: ', geocode-lat.
WRITE: / 'ALT: ', geocode-alt.
****Transform XML as XString to ABAP Values
WRITE: / 'Transformation with XSTRING'.
TRY.
    CALL TRANSFORMATION zgoogle_geocode_to_abap
    SOURCE XML x_xml
    RESULT geocode = geocode.
  CATCH cx_xslt_exception INTO xslt_err.
    error_text = xslt_err->get_text( ).
    WRITE: / error_text.
ENDTRY.
WRITE: / 'LON: ', geocode-lon.
WRITE: / 'LAT: ', geocode-lat.
WRITE: / 'ALT: ', geocode-alt.
<b>Result</b>
This is the result on our 6.20 Unicode System:
Transformation with STRING
No valid source context supplied
LON:
LAT:
ALT:
Transformation with XSTRING
LON:  12.570504
LAT:  48.078269
ALT:  0
I've tried it on our 6.20 and 6.40 NON-Unicode systems and the result was:
Transformation with STRING
LON:  12.570504
LAT:  48.078269
ALT:  0
Transformation with XSTRING
LON:  12.570504
LAT:  48.078269
ALT:  0
Finaly I've tried it on our Solutin Manager 4.0 which runs on Web AS 7.00 and is also a Unicode installation. Here the result is correct:
Transformation with STRING
LON:  12.570504
LAT:  48.078269
ALT:  0
Transformation with XSTRING
LON:  12.570504
LAT:  48.078269
ALT:  0
So now what to do? I've found nothing in OSS regarding this behaviour. Any tips? I also try a OSS Message.
Regards
Gregor

Answer 1

Hi,
Can you tell me about your project on short notes. For information.
Regards
R.Rajendran