--- a/gnv-artifacts/src/main/java/de/intevation/gnv/state/layer/LayerOutputState.java	Mon Mar 08 15:15:08 2010 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/state/layer/LayerOutputState.java	Tue Mar 09 11:42:57 2010 +0000
@@ -33,6 +33,7 @@
 import de.intevation.gnv.state.InputData;
 import de.intevation.gnv.state.OutputStateBase;
 import de.intevation.gnv.state.exception.StateException;
+import de.intevation.gnv.utils.ArtifactXMLUtilities;
 import de.intevation.gnv.utils.FileUtils;
 import de.intevation.gnv.utils.MapfileGenerator;
 import de.intevation.gnv.utils.MetaWriter;
@@ -102,12 +103,32 @@
                 format, XPATH_OUTPUT_MODE, ArtifactNamespaceContext.INSTANCE);
         if (outputMode.equalsIgnoreCase("wms")) {
             Collection<Result> data = this.fetchData();
-            XMLUtils.toStream(this.getWMS(uuid, callContext, data),outputStream);
+            if (data != null && !data.isEmpty()){
+                XMLUtils.toStream(this.getWMS(uuid, callContext, data),
+                                  outputStream);
+            }else{
+                this.writeExceptionReport2Stream(outputStream);
+            }
         }else if (outputMode.equalsIgnoreCase("zip")){
             Collection<Result> data = this.fetchData();
-            this.writeZip(uuid, callContext, outputStream, data);
+            if (data != null && !data.isEmpty()){
+                this.writeZip(uuid, callContext, outputStream, data);
+            }else{
+                this.writeExceptionReport2Stream(outputStream);
+            }
+            
         }
     }
+
+    /**
+     * @param outputStream
+     */
+    private void writeExceptionReport2Stream(OutputStream outputStream) {
+        Document document = XMLUtils.newDocument();
+        new ArtifactXMLUtilities().
+        createExceptionReport("No Data to Export", document);
+        XMLUtils.toStream(document,outputStream);
+    }
     
     
     /**