I'm trying to use SvgExporter to export a diagram. My code looks like

String path ="C:/test.svg";
        SvgExporter svgExporter = new SvgExporter(diagram, path);
        svgExporter.export();
 

svgExporter throws

java.lang.StringIndexOutOfBoundsException: String index out of range: -1
     at java.lang.String.substring(String.java:1954)
     at com.mindfusion.svg.Tools.ExtractPathName(Unknown Source)
     at com.mindfusion.svg.SvgDocument.<init>(Unknown Source)
     at com.mindfusion.svg.SvgGraphics2D.<init>(Unknown Source)
     at com.mindfusion.diagramming.export.SvgExporter.export(Unknown Source)
     at com.ierin.paragon2.client.reports.AbstractTreeReport.getImageFromDiagram(Abstrac
tTreeReport.java:254)


Any idea what is missing?

Thanks.