[Zoo-discuss] FOSS4G 2010 ZOO Workshop Problem

[Christian Rüh]

Hi there,

I tried to do the above workshop (http://www.zoo-project.org/site/ZooWorkshop2010/Content) and got stuck at step 3.3.1.2 (Creating WPS compliant OGR based Web Services -> Implementing single geometry processes -> Boundary -> Python version). I wasn't able to compile the C version (I'm don't really know anything about C and Linux which might be the problem) so I went for the Python version. If I try one of the URLs given to test the process I get: <ows:ExceptionReport xsi:schemaLocation="http://www.opengis.net/ows/1.1http://schemas.opengis.net/ows/1.1.0/owsExceptionReport.xsd" xml:lan="en" service="WPS" version="1.0.0">
<ows:Exception exceptionCode="NoApplicableCode">
<ows:ExceptionText>
TRACE : xmlXPathEval() failed
TRACE : <class 'libxml2.xpathError'>
Unable to run your python process properly. Please check the following messages : ['  File "/usr/lib/cgi-bin/ogr_ws_service_provider.py", line 18, in Boundary\n geometry=createGeometryFromWFS(inputs["InputPolygon"]["value"])\n', '  File "/usr/lib/cgi-bin/ogr_ws_service_provider.py", line 7, in createGeometryFromWFS\n res=ctxt.xpathEval("/*/*/*/*/*[local-name()=\'Polygon\' or local-\tname()=\'MultiPolygon\']")\n', '  File "/usr/lib/pymodules/python2.6/libxml2.py", line 4894, in xpathEval\n    if ret is None:raise xpathError(\'xmlXPathEval() failed\')\n']
</ows:ExceptionText>
</ows:Exception>
</ows:ExceptionReport>

There seems to be a problem with the libxml2 library but even with googling I was not able to fix it.

The Geoserver was started when the document told me to (but this does not matter as I've tested it without a running Geoserver, too). I'm using the OSGeo Live disk 3.0 because the README (http://zoo-project.org/trac/attachment/wiki/ZooWorkshop2010/Content/README) indicated that.
I guess it ain't important but I'm using it with VMWare Player 5 on Windows 7 x64.

Help would be greatly appreciated since I'm needing this for a seminar with my students in 2 weeks.

Cheers and thanks in advance for any help,
Christian