Re: [dotNetRDF-Support] Error when issuing CONSTRUCT statement to Virtuoso

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Thanks Rob!

I have another question but I'll start a new thread for it.

From: Rob Vesse [mailto:rv...@do...]
Sent: Thursday, January 30, 2014 12:18 PM
To: dotNetRDF User Help and Support
Cc: Edwin Toro
Subject: Re: [dotNetRDF-Support] Error when issuing CONSTRUCT statement to Virtuoso

Edwin

I've confirmed that this is indeed a change in behaviour with newer Virtuoso versions and am working on a fix for this.

You can track this issue as VIRT-397 (http://dotnetrdf.org/tracker/Issues/IssueDetail.aspx?id=397)

Rob

From: Rob Vesse <rv...@do...<mailto:rv...@do...>>
Reply-To: dotNetRDF User Help and Support <dot...@li...<mailto:dot...@li...>>
Date: Tuesday, 28 January 2014 12:05
To: dotNetRDF User Help and Support <dot...@li...<mailto:dot...@li...>>
Subject: Re: [dotNetRDF-Support] Error when issuing CONSTRUCT statement to Virtuoso

Ok that is useful to know, thanks for the additional information.

That would imply that this behaviour changed at some point in the v6 releases after the point at which I last installed a Virtuoso instance.

I suspect once I confirm this that it will be an easy fix

Rob

From: Edwin Toro <Ed...@la...<mailto:Ed...@la...>>
Reply-To: dotNetRDF User Help and Support <dot...@li...<mailto:dot...@li...>>
Date: Tuesday, 28 January 2014 12:01
To: dotNetRDF User Help and Support <dot...@li...<mailto:dot...@li...>>
Subject: Re: [dotNetRDF-Support] Error when issuing CONSTRUCT statement to Virtuoso

Rob,

Thanks for taking a look.

I tried v6 and have the same issue.  Just to be clear, I'm using the Open Source version of Virtuoso, 64-bit.

http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSDownload#Pre-built%20binaries%20for%20Windows

Version: 06.01.3127
Build: Dec 11 2013

From: Rob Vesse [mailto:rv...@do...]
Sent: Tuesday, January 28, 2014 2:04 PM
To: dotNetRDF User Help and Support
Subject: Re: [dotNetRDF-Support] Error when issuing CONSTRUCT statement to Virtuoso

Edwin

I suspect this may be a change in how the Virtuoso server communicates between v6 and v7.  The current code is all built and tested against v6 and I don't currently have a v7 instance to test against.  I will need to get a v7 install set up so I can debug this.

I'll get back to you when I know more,

Rob

From: Edwin Toro <Ed...@la...<mailto:Ed...@la...>>
Reply-To: dotNetRDF User Help and Support <dot...@li...<mailto:dot...@li...>>
Date: Tuesday, 28 January 2014 09:13
To: "dot...@li...<mailto:dot...@li...>" <dot...@li...<mailto:dot...@li...>>
Subject: [dotNetRDF-Support] Error when issuing CONSTRUCT statement to Virtuoso

Hello all,

After successfully running through the User Guide on the wiki, I starting writing some test cases that connected to my local Virtuoso Open Source installation.  Everything was working fine until I tried running a CONSTRUCT query:

VirtuosoManager virtuoso = newVirtuosoManager("localhost", "dba", "dba");

var results = virtuoso.Query("CONSTRUCT { ?s ?p ?o } WHERE { GRAPH <http://www.mycompany.com/exampleGraph> {?s ?p ?o}}");

The exception I get is:
Expected a single string value representing the serialization of the Graph resulting from a CONSTRUCT/DESCRIBE query but this was not received (Got 4 row(s) with 3column(s)

I can run this query in Virtuoso's Conductor and it returns data just fine.  Am I doing something wrong or is this one of the inconsistencies hinted at on the Virtuoso Storage Provider page?

Virtuoso Open Source distribution: virtuoso-opensource-7.0.0-x64-20130802
Version: 07.00.3203
Build: Aug 3 2013

dotNetRdf version: 1.0.3 (via NuGet)

Packages.config:
  <packageid="dotNetRDF"version="1.0.3"targetFramework="net45" />
  <packageid="dotNetRDF.Data.Virtuoso"version="1.0.3"targetFramework="net45" />
  <packageid="HtmlAgilityPack"version="1.4.6"targetFramework="net45" />
  <packageid="Newtonsoft.Json"version="5.0.8"targetFramework="net45" />
  <packageid="OpenLink.Data.Virtuoso"version="6.2.3128.1"targetFramework="net45" />
  <packageid="VDS.Common"version="1.2.0"targetFramework="net45" />

Thanks in advance for any help!

Regards,

Ed Toro

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