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I downloaded RDF examples from you website "http://vue.tufts.edu/resources/index.cfm" and only "animal.rdf" and "regression.rdf" load. For the others I get a blank page. No other reports of this issue that I could find so there has to be a problem at my end.
VUE version 2.2.8 on windows XP. I have 1GB memory. When I try to import one of the other RDFs my memory usage goes up to 930MB then stops growing but still no map displayed in VUE.