Webservice problem with tutorial and previewing data set

Sweet33bdx

Hi,

I've followed the following step-by-step tutorial (great !!! ) to train myself using web services and BIRT.

http://otadocs.opentext.com/documentation/ihub31-dev/DAG/index.html#page/DAG%2Faccessing-data-webservice.10.4.html

But I encounter an issue   : in step 10 ("In Edit Data Set, choose Preview Results."), my preview does not work, I've got the following error :

org.eclipse.birt.data.engine.odaconsumer.OdaDataException: Cannot execute the statement.

I followed the tutorial very precisely...and I always have this issue...

My BIRT version is 4.6.0.v201606072122

Could you help me please?