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ERROR: eseguiqueryAdvancedZoom.002 [Microsoft][Driver ODBC Microsoft Access] Uso di Null non valido
ERROR NUMBER: -2147217913

Query: Select distinct [Title], img as [img£££], [Authors], [Year] as [_Year], [Pubblication type], [Abstract], [Reference], [WEB Reference], iif(len([WEB Reference2])>0, iif(instr([WEB Reference2],'researchgate')>0, chr(60)+'img src='+chr(39)+'/spring2/images/sn2_ResearchGate.png'+chr(39)+' border=0'+chr(62)+' '+[WEB Reference2], [WEB Reference2]) ) as [WEB Reference 2], iif(val([Bibliografia-vista-eng].[PDF Reading permission])<=0 and (not(val([Bibliografia-vista-eng].[Reading permission])<=0)),[Internal reference]+' (pdf)'+'#/repository_2010/repository_show_document.asp?xmlsrcrepository=/repository_2010/repository.xml&lingua=en¶metro=pdon&p_query=p0&Protocollo_Documento='+[Internal reference]+'#','') as [Repository reference PDF], iif(val([Bibliografia-vista-eng].[Reading permission])<=0,[Internal reference]+'#/repository_2010/repository_show_document.asp?xmlsrcrepository=/repository_2010/repository.xml&lingua=en¶metro=veryshort&p_query=p0&Protocollo_Documento='+[Internal reference]+'#','') as [Repository reference], iif(len([Slides internal reference]),[Slides internal reference]+'#/repository_2010/repository_show_document.asp?xmlsrcrepository=/repository_2010/repository.xml&lingua=en¶metro=veryshort&p_query=p0&Protocollo_Documento='+[Slides internal reference]+'#','') as [Related Slides], iif(val([Bibliografia-vista-eng].[PDF Reading permission])<=0,[Downloadable PDF file],'') as [PDF Directly downloadable file], iif(val([Bibliografia-vista-eng].[Reading permission])<=0,[Downloadable file],'') as [Directly downloadable file], [ResearchUnitName]+'#/tecnopolo/imple/listezoom.asp?lingua=en&xmlsrclista=/tecnopolo/imple/unitadiricerca-lista.xml&rtdr=/tecnopolo/&k='+cstr([ResearchUnitName])+'#' as [Research unit], [Keywords], [Bibliografia-vista-eng].[LastUpdate], [id££], ResearchUnitName as [ResearchUnitName££] ,[Bibliografia-vista-eng].[id££] as [IDCAMPO], [impact factor], ReferenzaUnivoca FROM [Bibliografia-vista-eng] WHERE ((val([Bibliografia-vista-eng].[PDF Reading permission]) <= 0) or (val( [Bibliografia-vista-eng].[Reading permission]) <= 0)) AND ( ([id££] = 462) );