=== modified file 'dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/filter/DefaultFieldFilterService.java'
--- dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/filter/DefaultFieldFilterService.java	2014-06-20 09:09:40 +0000
+++ dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/filter/DefaultFieldFilterService.java	2014-06-20 09:10:42 +0000
@@ -95,15 +95,18 @@
     @Override
     public <T extends IdentifiableObject> CollectionNode filter( Class<?> klass, List<T> objects, List<String> fieldList )
     {
-        if ( objects == null || objects.isEmpty() )
-        {
-            return null;
-        }
-
         String fields = fieldList == null ? "" : Joiner.on( "," ).join( fieldList );
 
         Schema rootSchema = schemaService.getDynamicSchema( klass );
 
+        CollectionNode collectionNode = new CollectionNode( rootSchema.getCollectionName() );
+        collectionNode.setNamespace( rootSchema.getNamespace() );
+
+        if ( objects == null || objects.isEmpty() )
+        {
+            return collectionNode;
+        }
+
         FieldMap fieldMap = new FieldMap();
         Schema schema = schemaService.getDynamicSchema( objects.get( 0 ).getClass() );
 
@@ -119,9 +122,6 @@
             fieldMap = parserService.parseFieldFilter( fields );
         }
 
-        CollectionNode collectionNode = new CollectionNode( rootSchema.getCollectionName() );
-        collectionNode.setNamespace( rootSchema.getNamespace() );
-
         for ( Object object : objects )
         {
             collectionNode.addChild( buildComplexNode( fieldMap, klass, object ) );