--- a/artifacts/src/main/java/org/dive4elements/river/exports/ChartExportHelper.java	Fri Sep 20 14:22:44 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/exports/ChartExportHelper.java	Mon Sep 23 11:24:17 2013 +0200
@@ -345,16 +345,19 @@
             int items = data.getItemCount(i);
             for (int j = 0; j < items; j++) {
                 log.debug("write data: " + data.getX(i, j) + ", " + data.getY(i, j));
+                String xString;
+                String yString;
                 try {
-                    writer.writeNext(new String[] {
-                        format.format(data.getX(i, j)),
-                        format.format(data.getY(i, j))});
+                    xString = format.format(data.getX(i, j));
+                    yString = format.format(data.getY(i, j));
                 }
                 catch (NumberFormatException nfe) {
-                    writer.writeNext(new String[] {
-                        data.getX(i, j).toString(),
-                        data.getY(i, j).toString()});
+                    xString = data.getX(i, j).toString();
+                    yString = data.getY(i, j).toString();
                 }
+                writer.writeNext(new String[] {
+                    xString,
+                    yString});
             }
         }
     }