Hi Pantelis,

Development are looking into this error as it even occurs running against an 
empty database with the latest develop/7 build …

Best Regards
Hugh Williams
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> On 17 Feb 2016, at 10:21, Lorenz Bühmann <buehm...@informatik.uni-leipzig.de 
> <mailto:buehm...@informatik.uni-leipzig.de>> wrote:
> 
> Hello Pantelis,
> 
> it looks like a bug of course. The question is which Virtuoso version Bio2RDF 
> is currently using. Might be that the bug is fixed in latest versions, but if 
> you're not the maintainer of Bio2RDF it seems to be impossible to fix it. 
> Might be that there is a workaround, but that's what the developers should 
> know.
> 
> Kind regards,
> Lorenz
> 
>> No feedback?
>> 
>> Nobody has seen "Virtuoso 37000 Error SQ156: Internal Optimized compiler 
>> error : supposed to have ose in bracket outer in rdfinf.c:2636." in the past?
>> 
>> Kind regards,
>> Pantelis Natsiavas
>> 
>> 
>> 2016-02-13 14:40 GMT+02:00 Lorenz Bühmann 
>> <buehm...@informatik.uni-leipzig.de 
>> <mailto:buehm...@informatik.uni-leipzig.de>>:
>> Why do you ask this as a response to a totally different question? And 
>> what's the relationship to Virtuoso? I think this questions is better for 
>> something like answer.semanticweb.com <http://answer.semanticweb.com/> or 
>> stackoverflow. 
>> 
>> By the way, I do not understand the question: What do you mean by "I want to 
>> link to find a dataset"?
>> 
>> Lorenz
>> 
>>> Hi every body 
>>> I am trying to use bio2rdf, but i want to link to find a dataset.
>>> This link http://bio2rdf.org/bio2rdf.dataset_vocabulary 
>>> <http://bio2rdf.org/bio2rdf.dataset_vocabulary> give me an error.
>>> 
>>> any suggestion of other link could be helpfull.
>>> Kind regards 
>>> Fatma
>>> 
>>> 2016-02-12 14:55 GMT+01:00 Pantelis Natsiavas < 
>>> <mailto:natsia...@gmail.com>natsia...@gmail.com 
>>> <mailto:natsia...@gmail.com>>:
>>> Hi everybody.
>>> 
>>> I am trying to execute the query
>>> 
>>> PREFIX void: < <http://rdfs.org/ns/void#>http://rdfs.org/ns/void# 
>>> <http://rdfs.org/ns/void#>>
>>> PREFIX dv: <http://bio2rdf.org/bio2rdf.dataset_vocabulary 
>>> <http://bio2rdf.org/bio2rdf.dataset_vocabulary>:>
>>> PREFIX dcterms: < <http://purl.org/dc/terms/>http://purl.org/dc/terms/ 
>>> <http://purl.org/dc/terms/>>
>>> PREFIX drugbank: < 
>>> <http://bio2rdf.org/drugbank_vocabulary>http://bio2rdf.org/drugbank_vocabulary
>>>  <http://bio2rdf.org/drugbank_vocabulary>:>
>>> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns# 
>>> <http://www.w3.org/1999/02/22-rdf-syntax-ns#>>
>>>        
>>> SELECT ?drug 
>>>        ?drugTitle
>>>        ?brandTitle 
>>> WHERE {
>>>  ?drug a drugbank:Drug .
>>>  OPTIONAL { ?drug dcterms:title ?drugTitle .
>>>             ?drugTitle bif:contains "'Ibuprofen'"} .
>>>  OPTIONAL { ?drug drugbank:brand ?brand .
>>>             ?brand bif:contains "'Ibuprofen'"} .
>>>  OPTIONAL { ?brand dcterms:title ?brandTitle .
>>>             ?brandTitle bif:contains "'Ibuprofen'"} . 
>>> }
>>> 
>>> which uses bif:contains inside optionals. 
>>> 
>>> I get the error:
>>> 
>>> Virtuoso 37000 Error SQ156: Internal Optimized compiler error : supposed to 
>>> have ose in bracket outer in rdfinf.c:2636.
>>> Please report the statement compiled.
>>> 
>>> SPARQL query:
>>> 
>>> #output-format:text/html
>>> PREFIX void: 
>>> PREFIX dv: 
>>> PREFIX dcterms: 
>>> PREFIX drugbank: 
>>> PREFIX rdf: 
>>>        
>>> SELECT ?drug 
>>>        ?drugTitle
>>>        ?brandTitle 
>>> WHERE {
>>>  ?drug a drugbank:Drug .
>>>  OPTIONAL { ?drug dcterms:title ?drugTitle .
>>>             ?drugTitle bif:contains "'Ibuprofen'"} .
>>>  OPTIONAL { ?drug drugbank:brand ?brand .
>>>             ?brand bif:contains "'Ibuprofen'"} .
>>>  OPTIONAL { ?brand dcterms:title ?brandTitle .
>>>             ?brandTitle bif:contains "'Ibuprofen'"} . 
>>> }
>>> Is this an invalid query? I tried the same query with only the first 
>>> optional clause in place and I don't get the error, but I don't get any 
>>> results either. It seems it takes too long to execute (more than 10 
>>> minutes).
>>> 
>>> Could you please point me on how I could use such a restriction with 
>>> multiple optional clauses in a performance suitable manner?
>>> 
>>> Kind regards,
>>> Pantelis Natsiavas
>>> 
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>>  -- 
>> Lorenz Bühmann
>> AKSW group, University of Leipzig
>> Group: http://aksw.org <http://aksw.org/> - semantic web research center
>> 
>> ------------------------------------------------------------------------------
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>> 
>> 
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> -- 
> Lorenz Bühmann
> AKSW group, University of Leipzig
> Group: http://aksw.org <http://aksw.org/> - semantic web research center
> ------------------------------------------------------------------------------
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