=== modified file 'dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/importers/DefaultIdentifiableObjectImporter.java'
--- dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/importers/DefaultIdentifiableObjectImporter.java	2015-02-24 11:37:53 +0000
+++ dhis-2/dhis-services/dhis-service-dxf2/src/main/java/org/hisp/dhis/dxf2/metadata/importers/DefaultIdentifiableObjectImporter.java	2015-03-17 11:18:29 +0000
@@ -492,8 +492,12 @@
             if ( PeriodType.class.isAssignableFrom( field.getType() ) )
             {
                 PeriodType periodType = ReflectionUtils.invokeGetterMethod( field.getName(), object );
-                periodType = objectBridge.getObject( periodType );
-                ReflectionUtils.invokeSetterMethod( field.getName(), object, periodType );
+
+                if ( periodType != null )
+                {
+                    periodType = objectBridge.getObject( periodType );
+                    ReflectionUtils.invokeSetterMethod( field.getName(), object, periodType );
+                }
             }
         }
     }