--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/MainValuesQFacet.java	Mon Jul 29 12:29:40 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/MainValuesQFacet.java	Mon Jul 29 15:02:22 2013 +0200
@@ -128,6 +128,10 @@
         StickyAxisAnnotation annotation = null;
         if (this.name.equals(DURATION_MAINVALUES_Q)) {
             for (NamedDouble q: qs) {
+                if (Double.isNaN(q.getValue())) {
+                    logger.warn("NaN MainValue " + q.getName());
+                    continue;
+                }
                 annotation =
                     new StickyAxisAnnotation(
                         q.getName(),
@@ -142,6 +146,10 @@
         }
         else {
             for (NamedDouble q: qs) {
+                if (Double.isNaN(q.getValue())) {
+                    logger.warn("NaN MainValue " + q.getName());
+                    continue;
+                }
                 annotation =
                     new StickyAxisAnnotation(
                         q.getName(),