Re: [Virtuoso-users] Virtuoso 37000 Error

[Ivan Mikhailov]

Hello Shamimul
Your query is valid. It looks like the configuration of SPARQL endpoint
describes the data set in such a way that the dataset may consist of
default graph but zero named graphs. This makes any GRAPH ?g {...}
graph group template useless and the debugging flag forces the compiler
to signal an error.
Try to run this query with empty "default graph" field, if the web page
contains such a field. If you can't alter the configuration, try call
this query via ODBC, UDBC, IODBC or JDBC, any SQL client will do, such
as isql shipped with Virtuoso.
If you have enough permissions you can also inspect the content of
DB.DBA.SYS_SPARQL_HOST table and check SH_DEFINES there (see http://doc
s.openlinksw.com/virtuoso/rdfdefaultgraph/ for more details)
Best Regards,
Ivan Mikhailov
OpenLink Software
http://virtuoso.openlinksw.com
On Fri, 2016-06-10 at 19:08 -0400, S.M.Shamimul Hasan wrote:
> Greetings,
> 
> I am running the following query on Virtuoso (7.1.0) SPARQL
> endpoint. 
> 
> *
> ***
> select  (?o1 as ?initialseed), ?begin, ?end, (count(?mid)+1 as
> ?length) 
> where {
> GRAPH ?g
>     {
>     ?begin  ?o1.
>     ?end * ?mid.
>     ?mid * ?begin.
>     }
> 
>  {
>     select ?o1, ?o2, ?e
>     where{
>         GRAPH ?g1
>         {
>         ?s  ?o1.
>         ?s  ?o2.
>         ?s 
> '0'^^xsd:decimal.
>         ?s  ?e.
>         ?s1  ?o1.
>         ?s1  ?o2.
>         ?s1 
> '5'^^xsd:decimal.
>         ?s1 
> '5'^^xsd:decimal
>      }
>     }ORDER BY ASC(?e) LIMIT 1 
>  }
> 
> }GROUP BY ?o1 ?begin ?end
> 
> *
> **
> It is giving me following error.
> 
> 
> 
> Virtuoso 37000 Error SP031: SPARQL compiler: Variable
> '_::trans_subj_7_1' is used in subexpressions of the query but not
> assigned
> 
> ***
> 
> In the query instead of "GRAPH  ?g" if I use FROM clause with graph
> URI  then query works fine.  However I need generic "GRAPH ?g."
> Please let me know how I can fix it.
> 
> Thank you.
> 
> Regards,
> S.M.Shamimul Hasan
> 
> 
> 
> 
> 
> ---
> ---
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> patterns at an interface-level. Reveals which users, apps, and
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Re: [Virtuoso-users] Virtuoso 37000 Error

[Quentin]

 

RE: [VIRTUOSO-USERS] VIRTUOSO 37000 ERROR

From
q [11]

To
virtuoso-users@lists.sourceforge.net [11]

Date
Today 09:56

<- [12] <<- [12] -> [12] [] [13] 

Hi S.M.Shamimul, 

I'm not with openlink so my advice is only from a fellow developer. I
have a few minutes though so here's my thoughts on your problem. 

The error you're getting looks like a bug to me, maybe in the query
optimiser since it's occurring after SQL compilation. I can't tell you
much about that bug except that it seems to occur while exploring
transitives but I can give you some tips that might help you avoid it.
Transitives in Virtuoso Open Source are a relatively unstable feature 

Your SPARQL query could be pre-optimised a bit which might simplify it
enough for the query optimiser to avoid whatever situation is causing
that error. 

Your first subquery has three clauses but the first two are not related
to each other. Reordering these might give some clues to the query
optimiser and potentially prevent a full self-join on the graph. 

May as well use a prefix too. 

prefix abc: <http://test.edu/abc/vocab/> 

Instead of:
 ?begin <http://test.edu/abc/vocab/getInfectedBy [3]> ?o1.
 ?end <http://test.edu/abc/vocab/getInfectedBy [3]>* ?mid.
 ?mid <http://test.edu/abc/vocab/getInfectedBy [3]>* ?begin. 

Do: 

 ?begin abc:getInfectedBy [3] ?o1.
 ?mid abc:getInfectedBy [3]* ?begin.
 ?end abc:getInfectedBy [3]* ?mid. 

That way, each step is related to something previous. It's not always
true but cause ordering can be important sometimes. At least this way,
you don't have to trust that the query optimiser (which is a black box
to us) will work it out. 

Since you're using property paths, the ?mid node might be redundant, at
least you probably don't need two property paths in that clause. This
might be what you intended:
 ?begin abc:getInfectedBy ?o1.
 ?mid abc:getInfectedBy ?begin.
 ?end abc:getInfectedBy* ?mid. 

That will still experience the error. Modifying the query as below will
not experience the error but probably doesn't do what you want.
Interesting point for the developers who look into it though. This
version requires at least one instance of ?mid to exist. I think the
above lets ?end and ?mid bind to the same node though I'm not certain
without having data to test it against.
 ?begin abc:getInfectedBy ?o1.
 ?mid abc:getInfectedBy* ?begin.
 ?end abc:getInfectedBy ?mid. 

Another issue, not the actual cause of error, is that the second
subquery selects a bunch of variables that don't seem to be used. Is
your intent to filter ?o1 to only include the nodes satisfying the
clauses in the second subquery? 

Be aware that you're not filtering ?g and ?g1 so these can be satisfied
with any graph in your DB, including the same graph. If this is intended
then you can remove the graph clauses entirely and combine the two
subqueries into one query which will operate over the entire DB. Such a
query will probably not experience the error you're encountering at all.


Regarding the literals in your second subquery, these can be more
efficiently processed as filtered variables than as literals. Filtering
variables is nearly always more efficient than satisfying literals.
That's probably not the source of the error but it's a good idea
generally. 

?s <http://test.edu/abc/vocab/dendrogram_iteration [6]>
'0'^^xsd:decimal. 

becomes 

?s abc:dendrogram_iteration [6] ?iter. 

filter ( ?iter = '0'^^xsd:decimal ) 

You also seem to be ordering the query and then limiting it to 1 row
which seems redundant, the results from the query aren't selected in the
main query so it's only purpose is to filter ?o1 I guess. 

The last two lines of the second subquery are duplicates and one can be
removed. 

You should probably have a closer look at your second query and make
sure it does what you intend it to do. Work with it alone to get it
working before you include it in the main query. 

Tinkering with your query, it appears that the mere presence of the
second subquery causes the error, I guess that the transitive predicates
don't play well with subqueries, that's probably a bug. 

Regards, 

Quentin 

Guiding Hand Solutions 

On 2016-06-11 07:08, S.M.Shamimul Hasan wrote: 

> Greetings,
> 
> I am running the following query on Virtuoso (7.1.0) SPARQL endpoint. 
> 
> 
> select (?o1 as ?initialseed), ?begin, ?end, (count(?mid)+1 as ?length) 
> where {
> GRAPH ?g
> {
> ?begin <http://test.edu/abc/vocab/getInfectedBy [3]> ?o1.
> ?end <http://test.edu/abc/vocab/getInfectedBy [3]>* ?mid.
> ?mid <http://test.edu/abc/vocab/getInfectedBy [3]>* ?begin.
> }
> 
> {
> sele

Re: [Virtuoso-users] Virtuoso 37000 Error

[Quentin]

 

I'd suggest reviewing the documentation on property paths as well. 

https://www.w3.org/2009/sparql/wiki/Feature:PropertyPaths 

http://docs.openlinksw.com/virtuoso/sparqlextensions.html#rdfsparqlaggregatepathexpressions


On 2016-06-11 07:08, S.M.Shamimul Hasan wrote: 

> Greetings,
> 
> I am running the following query on Virtuoso (7.1.0) SPARQL endpoint. 
> 
> 
> select (?o1 as ?initialseed), ?begin, ?end, (count(?mid)+1 as ?length) 
> where {
> GRAPH ?g
> {
> ?begin  ?o1.
> ?end * ?mid.
> ?mid * ?begin.
> }
> 
> {
> select ?o1, ?o2, ?e
> where{
> GRAPH ?g1
> {
> ?s  ?o1.
> ?s  ?o2.
> ?s  '0'^^xsd:decimal.
> ?s  ?e.
> ?s1  ?o1.
> ?s1  ?o2.
> ?s1  '5'^^xsd:decimal.
> ?s1  '5'^^xsd:decimal
> }
> }ORDER BY ASC(?e) LIMIT 1 
> }
> 
> }GROUP BY ?o1 ?begin ?end
> 
> ***
> It is giving me following error.
> 
> 
> 
> Virtuoso 37000 Error SP031: SPARQL compiler: Variable '_::trans_subj_7_1' is 
> used in subexpressions of the query but not assigned
> 
> ***
> 
> In the query instead of "GRAPH ?g" if I use FROM clause with graph URI then 
> query works fine. However I need generic "GRAPH ?g." Please let me know how I 
> can fix it.
> 
> Thank you.
> 
> Regards,
> S.M.Shamimul Hasan
> 
> --
> What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
> patterns at an interface-level. Reveals which users, apps, and protocols are 
> consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
> J-Flow, sFlow and other flows. Make informed decisions using capacity 
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Links:
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[2] https://lists.sourceforge.net/lists/listinfo/virtuoso-users
[3] http://test.edu/abc/vocab/getInfectedBy
[4] http://test.edu/abc/vocab/dendrogram_infector_pid
[5] http://test.edu/abc/vocab/dendrogram_infectee_pid
[6] http://test.edu/abc/vocab/dendrogram_iteration
[7] http://test.edu/abc/vocab/dendrogram_exposureday
[8] http://test.edu/abc/vocab/contactnetwork_pid1
[9] http://test.edu/abc/vocab/contactnetwork_pid2
[10] http://test.edu/abc/vocab/contactnetwork_acttype1
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[Virtuoso-users] Virtuoso 37000 Error

[S.M.Shamimul Hasan]

Greetings,

I am running the following query on Virtuoso (7.1.0) SPARQL endpoint.


select  (?o1 as ?initialseed), ?begin, ?end, (count(?mid)+1 as ?length)
where {
GRAPH ?g
{
?begin  ?o1.
?end * ?mid.
?mid * ?begin.
}

 {
select ?o1, ?o2, ?e
where{
GRAPH ?g1
{
?s  ?o1.
?s  ?o2.
?s 
'0'^^xsd:decimal.
?s  ?e.
?s1  ?o1.
?s1  ?o2.
?s1 
'5'^^xsd:decimal.
?s1 
'5'^^xsd:decimal
 }
}ORDER BY ASC(?e) LIMIT 1
 }

}GROUP BY ?o1 ?begin ?end

***
It is giving me following error.



Virtuoso 37000 Error SP031: SPARQL compiler: Variable '_::trans_subj_7_1'
is used in subexpressions of the query but not assigned

***

In the query instead of "GRAPH  ?g" if I use FROM clause with graph URI
then query works fine.  However I need generic "GRAPH ?g." Please let me
know how I can fix it.

Thank you.

Regards,
S.M.Shamimul Hasan
--
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patterns at an interface-level. Reveals which users, apps, and protocols are 
consuming the most bandwidth. Provides multi-vendor support for NetFlow, 
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[Virtuoso-users] Virtuoso 37000 Error SP031 with FILTER NOT EXISTS inside SERVICE clause

[Alison Callahan]

Hello all,

I am running Virtuoso Opensource 6.1.7 on Ubuntu.

I am trying to use FILTER NOT EXISTS inside a SERVICE clause, as follows:

SELECT ?a ?val ?label
WHERE {
 ?a  ?val .
 SERVICE  {
?a rdfs:label ?label .
FILTER NOT EXISTS {?a  http://example.com/cvalue>
}
}
}

When I try to run this query, I get the following error:

Virtuoso 37000 Error SP031: SPARQL compiler: The support of SPARQL 1.1
FILTER EXISTS / FILTER NOT EXISTS test syntax is not enabled for the
SERVICE http://otherendpoint.com/sparql> at line 7 (bit 0x2000 is
not set)

Both the endpoint I am querying from and the endpoint in the service clause
are Virtuoso 6.1.7 endpoints, and the following query returns correct
results at the endpoint specified in the service clause:

SELECT ?a ?label {
?a rdfs:label ?label .
FILTER NOT EXISTS {?a  http://example.com/cvalue>
}
}

... so the issue is not that FILTER NOT EXISTS is not enabled at the
endpoint in the service clause.

How should I proceed? Thanks,

Alison
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Re: [Virtuoso-users] Virtuoso 37000 Error SP031

[Hugh Williams]

Hi Markus,

Can you please confirm the version of Virtuoso being used by running the 
command:

virtuoso-t -?

As there was a fix for a similar SP031 error in February, thus I would suggest 
you try using the latest Virtuoso open source develop/6 build from github, if 
not doing so already, at:

http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VOSGitUsage

Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc.  //  http://www.openlinksw.com/
Weblog   -- http://www.openlinksw.com/blogs/
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On 21 Apr 2013, at 09:41, Markus Freudenberg  
wrote:

> Hello there,
> 
> i'm getting this error while using a subquery: (on version 6.1.76)
> Virtuoso 37000 Error SP031: SPARQL compiler: Internal error: 
> sparp_tree_full_copy() is used to copy req_top with nonzero equiv_count
> 
> The subquery works fine on its own and returns a scalar value:
> 
> 
> SELECT ?s ?p ?o
> FROM  
> FROM 
> WHERE {{{?tag ?p ?o} UNION {?s ?p ?tag}}
> FILTER (?tag = (
> 
> SELECT ?tag
> FROM  
> FROM 
> WHERE {
> ?tag  :means ?skos.
> ?doc :tagged ?tag .
> FILTER (?doc = :DocEntry29)
> FILTER (?skos = )
> 
> }))}
> 
> Would be great if someone can explain the error message and/or has a solution.
> Thank you in advance...
> 
> M.F.
> --
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> analytics on semi-structured data. The platform includes APIs for building
> apps and a phenomenal toolset for data science. Developers can use
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> https://lists.sourceforge.net/lists/listinfo/virtuoso-users



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[Virtuoso-users] Virtuoso 37000 Error SP031

[Markus Freudenberg]

Hello there,

i'm getting this error while using a subquery: (on version 6.1.76)
Virtuoso 37000 Error SP031: SPARQL compiler: Internal error:
sparp_tree_full_copy() is used to copy req_top with nonzero equiv_count

The subquery works fine on its own and returns a scalar value:


SELECT ?s ?p ?o
FROM 
FROM 
WHERE {{{?tag ?p ?o} UNION {?s ?p ?tag}}
FILTER (?tag = (

SELECT ?tag
FROM 
FROM 
WHERE {
?tag  :means ?skos.
?doc :tagged ?tag .
FILTER (?doc = :DocEntry29)
FILTER (?skos = )

}))}

Would be great if someone can explain the error message and/or has a
solution.
Thank you in advance...

M.F.
--
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analytics on semi-structured data. The platform includes APIs for building
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Re: [Virtuoso-users] Virtuoso 37000 Error SP031

[Hugh Williams]

Hi Dave,

I am checking with development on this and will let you know what they report 
back ...

Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc.  //  http://www.openlinksw.com/
Weblog   -- http://www.openlinksw.com/blogs/
LinkedIn -- http://www.linkedin.com/company/openlink-software/
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On 25 Jan 2013, at 09:26, David Brooks  wrote:

> Hi Hugh,
> 
> Do you have an update as to when this might be fixed? I've just pulled the 
> latest code on the develop/6 branch as I am wanting to use BIND() and found 
> this bug is still present...
> 
> 
> Thanks,
> Dave
> 
> On 23/11/12 5:42 AM, Hugh Williams wrote:
>> Hi David,
>> 
>> Thanks for the details of where this error started occurring which is around 
>> when some patches for “minus” where committed, I have reported this to 
>> development for resolution and will let you know when there is a fix in 
>> github ...
>>  
>> Best Regards
>> Hugh Williams
>> Professional Services
>> OpenLink Software, Inc.  //  http://www.openlinksw.com/
>> Weblog   -- http://www.openlinksw.com/blogs/
>> LinkedIn -- http://www.linkedin.com/company/openlink-software/
>> Twitter  -- http://twitter.com/OpenLink
>> Google+  -- http://plus.google.com/100570109519069333827/
>> Facebook -- http://www.facebook.com/OpenLinkSoftware
>> Universal Data Access, Integration, and Management Technology Providers
>> 
>> On 22 Nov 2012, at 02:51, David Brooks wrote:
>> 
>>> Hi Hugh,
>>> 
>>> After a bit of digging, the query works with git SHA 9ae1782 and dies with 
>>> 442379d.
>>> 
>>> 
>>> Thanks,
>>> Dave
>>> 
>>> On 22/11/12 11:26 AM, David Brooks wrote:
 And even get the error with:
 select * where {
graph ?g {
  ?s ?p ?o MINUS { ?a ?b ?c }
  }
}
 
 Thanks.
 
 On 22/11/12 11:00 AM, David Brooks wrote:
> Version 6.1.7-dev.3127-pthreads as of Nov 16 2012
> 
> On 22/11/12 11:12 AM, Hugh Williams wrote:
>> Hi David,
>> 
>> Can you please confirm the exact version of Virtuoso in use by running 
>> the following:
>> 
>>  virtuoso-t -?
>> 
>> Which will provide he version number and build date ...
>> 
>> Best Regards
>> Hugh Williams
>> Professional Services
>> OpenLink Software, Inc.  //  http://www.openlinksw.com/
>> Weblog   -- http://www.openlinksw.com/blogs/
>> LinkedIn -- http://www.linkedin.com/company/openlink-software/
>> Twitter  -- http://twitter.com/OpenLink
>> Google+  -- http://plus.google.com/100570109519069333827/
>> Facebook -- http://www.facebook.com/OpenLinkSoftware
>> Universal Data Access, Integration, and Management Technology Providers
>> 
>> On 21 Nov 2012, at 21:42, David Brooks wrote:
>> 
>>> I also meant to say that this is with Version 06.01.3127
>>> 
>>> 
>>> Thanks.
>>> 
>>> On 22/11/12 10:36 AM, David Brooks wrote:
 Hi, 
 
 I'm getting "Virtuoso 37000 Error SP031: SPARQL compiler: Internal 
 error: sparp_find_origin_of_external_var(): external source equiv is 
 found, external source var is not" with:
 
 PREFIX prv: 
 
 select * where {
graph  {
   ?g a 
 
  MINUS { ?s prv:precededBy ?g }
   }
}
 
 It works without the MINUS part.
 
 
 Thanks,
 Dave
 
>>> 
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>> 
> 
 
>>> 
>> 
> 
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Re: [Virtuoso-users] Virtuoso 37000 Error SP031

[David Brooks]

Hi Hugh,

Do you have an update as to when this might be fixed? I've just pulled 
the latest code on the develop/6 branch as I am wanting to use BIND() 
and found this bug is still present...



Thanks,
Dave

On 23/11/12 5:42 AM, Hugh Williams wrote:

Hi David,

Thanks for the details of where this error started occurring which is 
around when some patches for “minus” where committed, I have reported 
this to development for resolution and will let you know when there is 
a fix in github ...


Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc.  // http://www.openlinksw.com/
Weblog   -- http://www.openlinksw.com/blogs/
LinkedIn -- http://www.linkedin.com/company/openlink-software/
Twitter  -- http://twitter.com/OpenLink
Google+  -- http://plus.google.com/100570109519069333827/
Facebook -- http://www.facebook.com/OpenLinkSoftware
Universal Data Access, Integration, and Management Technology Providers

On 22 Nov 2012, at 02:51, David Brooks wrote:


Hi Hugh,

After a bit of digging, the query works with git SHA 9ae1782 and dies 
with 442379d.



Thanks,
Dave

On 22/11/12 11:26 AM, David Brooks wrote:

And even get the error with:
select * where {
graph ?g {
  ?s ?p ?o MINUS { ?a ?b ?c }
  }
}

Thanks.

On 22/11/12 11:00 AM, David Brooks wrote:

Version 6.1.7-dev.3127-pthreads as of Nov 16 2012

On 22/11/12 11:12 AM, Hugh Williams wrote:

Hi David,

Can you please confirm the exact version of Virtuoso in use by 
running the following:


virtuoso-t -?

Which will provide he version number and build date ...

Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc.// http://www.openlinksw.com/
Weblog   -- http://www.openlinksw.com/blogs/
LinkedIn -- http://www.linkedin.com/company/openlink-software/
Twitter  -- http://twitter.com/OpenLink
Google+  -- http://plus.google.com/100570109519069333827/
Facebook -- http://www.facebook.com/OpenLinkSoftware
Universal Data Access, Integration, and Management Technology 
Providers


On 21 Nov 2012, at 21:42, David Brooks wrote:


I also meant to say that this is with Version 06.01.3127


Thanks.

On 22/11/12 10:36 AM, David Brooks wrote:

Hi,

I'm getting "Virtuoso 37000 Error SP031: SPARQL compiler: 
Internal error: sparp_find_origin_of_external_var(): external 
source equiv is found, external source var is not" with:


PREFIX prv: 

select * where {
   graph  {
  ?g a

 MINUS { ?s prv:precededBy ?g }
  }
   }


It works without the MINUS part.


Thanks,
Dave



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Re: [Virtuoso-users] Virtuoso 37000 Error SP031

[Hugh Williams]

Hi David,

Can you please confirm the exact version of Virtuoso in use by running the 
following:

virtuoso-t -?

Which will provide he version number and build date ...

Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc.  //  http://www.openlinksw.com/
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Universal Data Access, Integration, and Management Technology Providers

On 21 Nov 2012, at 21:42, David Brooks wrote:

> I also meant to say that this is with Version 06.01.3127
> 
> 
> Thanks.
> 
> On 22/11/12 10:36 AM, David Brooks wrote:
>> Hi, 
>> 
>> I'm getting "Virtuoso 37000 Error SP031: SPARQL compiler: Internal error: 
>> sparp_find_origin_of_external_var(): external source equiv is found, 
>> external source var is not" with:
>> 
>> PREFIX prv: 
>> 
>> select * where {
>>graph  {
>>   ?g a 
>> 
>>  MINUS { ?s prv:precededBy ?g }
>>   }
>>}
>> 
>> It works without the MINUS part.
>> 
>> 
>> Thanks,
>> Dave
>> 
> 
> --
> Monitor your physical, virtual and cloud infrastructure from a single
> web console. Get in-depth insight into apps, servers, databases, vmware,
> SAP, cloud infrastructure, etc. Download 30-day Free Trial.
> Pricing starts from $795 for 25 servers or applications!
> http://p.sf.net/sfu/zoho_dev2dev_nov___
> Virtuoso-users mailing list
> Virtuoso-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/virtuoso-users



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Re: [Virtuoso-users] Virtuoso 37000 Error SP031

[David Brooks]

I also meant to say that this is with Version 06.01.3127


Thanks.

On 22/11/12 10:36 AM, David Brooks wrote:

Hi,

I'm getting "Virtuoso 37000 Error SP031: SPARQL compiler: Internal 
error: sparp_find_origin_of_external_var(): external source equiv is 
found, external source var is not" with:


PREFIX prv: 

select * where {
   graph  {
  ?g a

 MINUS { ?s prv:precededBy ?g }
  }
   }


It works without the MINUS part.


Thanks,
Dave



--
Monitor your physical, virtual and cloud infrastructure from a single
web console. Get in-depth insight into apps, servers, databases, vmware,
SAP, cloud infrastructure, etc. Download 30-day Free Trial.
Pricing starts from $795 for 25 servers or applications!
http://p.sf.net/sfu/zoho_dev2dev_nov___
Virtuoso-users mailing list
Virtuoso-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/virtuoso-users

[Virtuoso-users] Virtuoso 37000 Error SP031

[David Brooks]

Hi,

I'm getting "Virtuoso 37000 Error SP031: SPARQL compiler: Internal 
error: sparp_find_origin_of_external_var(): external source equiv is 
found, external source var is not" with:


   PREFIX prv: 

   select * where {
   graph  {
  ?g a
   
 MINUS { ?s prv:precededBy ?g }
  }
   }


It works without the MINUS part.


Thanks,
Dave


--
Monitor your physical, virtual and cloud infrastructure from a single
web console. Get in-depth insight into apps, servers, databases, vmware,
SAP, cloud infrastructure, etc. Download 30-day Free Trial.
Pricing starts from $795 for 25 servers or applications!
http://p.sf.net/sfu/zoho_dev2dev_nov___
Virtuoso-users mailing list
Virtuoso-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/virtuoso-users