--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixAvSectorFacet.java	Wed Jun 13 10:19:44 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixAvSectorFacet.java	Wed Jun 13 11:13:17 2012 +0000
@@ -70,24 +70,35 @@
 
             double km = access.getCurrentKm();
 
+            logger.debug("Current KM = " + km);
+
             KMIndex<AnalysisPeriod []> kmPeriods = result.getAnalysisPeriods();
             KMIndex.Entry<AnalysisPeriod []> kmPeriodsEntry =
                 kmPeriods.search(km);
 
             if (kmPeriodsEntry == null) {
+                logger.warn("No analysis periods found for km '" + km + "'");
                 return null;
             }
 
             AnalysisPeriod[] periods = kmPeriodsEntry.getValue();
 
             if (periods == null) {
+                logger.warn("No analysis periods specified!");
                 return null;
             }
+
             QWD[] qwdData = periods[index].getQSectorAverages();
+
+            if (logger.isDebugEnabled()) {
+                int resSize = qwdData != null ? qwdData.length : -1;
+                logger.debug("Found " + resSize + " result elements.");
+            }
+
             return qwdData;
         }
         else {
-            logger.debug("Not an instance of FixationArtifact.");
+            logger.warn("Artifact is no instance of FLYSArtifact.");
             return null;
         }
     }