diff --git a/hsarweb/src/de/hsadmin/web/DomainModule.java b/hsarweb/src/de/hsadmin/web/DomainModule.java
index 054a7a5..e6f52cc 100644
--- a/hsarweb/src/de/hsadmin/web/DomainModule.java
+++ b/hsarweb/src/de/hsadmin/web/DomainModule.java
@@ -58,7 +58,6 @@ public class DomainModule extends GenericModule {
 		});
 		userProp.setWriteOnce(true);
 		PropertyConfig optionsProp = new PropertyConfig(moduleConfig, "domainoptions", String.class, PropertyTableColumn.HIDDEN, new DomainOptionsPropertyFieldFactory(this));
-		optionsProp.setWriteOnce(true);
 		PropertyConfig pacProp = new PropertyConfig(moduleConfig, "pac", String.class, PropertyTableColumn.HIDDEN);
 		pacProp.setDefaultValue(new PropertyDefaultValue() {
 			@Override
diff --git a/hsarweb/src/de/hsadmin/web/config/PropertyFieldFactory.java b/hsarweb/src/de/hsadmin/web/config/PropertyFieldFactory.java
index 7a2a6d3..5321f35 100644
--- a/hsarweb/src/de/hsadmin/web/config/PropertyFieldFactory.java
+++ b/hsarweb/src/de/hsadmin/web/config/PropertyFieldFactory.java
@@ -5,7 +5,7 @@ import de.hsadmin.web.XmlrpcProperty;
 
 public interface PropertyFieldFactory {
 
-	public Object createFieldComponent(PropertyConfig prop, XmlrpcProperty value);
+	public Object createFieldComponent(PropertyConfig prop, XmlrpcProperty value) throws HsarwebException;
 	
 	public XmlrpcProperty getValue(PropertyConfig prop, Object component) throws HsarwebException;
 
diff --git a/hsarweb/src/de/hsadmin/web/vaadin/DomainOptionsPropertyFieldFactory.java b/hsarweb/src/de/hsadmin/web/vaadin/DomainOptionsPropertyFieldFactory.java
index 158d481..1ea5e28 100644
--- a/hsarweb/src/de/hsadmin/web/vaadin/DomainOptionsPropertyFieldFactory.java
+++ b/hsarweb/src/de/hsadmin/web/vaadin/DomainOptionsPropertyFieldFactory.java
@@ -1,26 +1,19 @@
 package de.hsadmin.web.vaadin;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
 import com.vaadin.terminal.Sizeable;
-import com.vaadin.ui.AbstractField;
-import com.vaadin.ui.Button;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.VerticalLayout;
 
-import de.hsadmin.web.AbstractProperty;
-import de.hsadmin.web.GenericModule;
 import de.hsadmin.web.HsarwebException;
 import de.hsadmin.web.ListOfStringsProperty;
 import de.hsadmin.web.Module;
 import de.hsadmin.web.XmlrpcProperty;
-import de.hsadmin.web.config.LocaleConfig;
 import de.hsadmin.web.config.ModuleConfig;
 import de.hsadmin.web.config.PropertyConfig;
 import de.hsadmin.web.config.PropertyFieldFactory;
@@ -39,14 +32,12 @@ public class DomainOptionsPropertyFieldFactory implements PropertyFieldFactory {
 	private boolean readOnly = false;
 	private boolean writeOnce = false;
 	private VerticalLayout layout;
-	private List<SingleDomainOption> optionLayout ;
-	private ListOfStringsProperty setOptions ;
+	private final List<SingleDomainOption> optionLayout ;
 
 	public DomainOptionsPropertyFieldFactory(Module module) {
 		this.module = module;
 		this.config = module.getModuleConfig();
 		optionLayout = new ArrayList<SingleDomainOption>() ;
-		setOptions = new ListOfStringsProperty() ;
 	}
 	
 	private void repaint() {
@@ -57,11 +48,11 @@ public class DomainOptionsPropertyFieldFactory implements PropertyFieldFactory {
 	}
 
 	@Override
-	public Object createFieldComponent(PropertyConfig prop, XmlrpcProperty value) {
-		this.setOptions = (ListOfStringsProperty) value ;
+	public Object createFieldComponent(PropertyConfig prop, XmlrpcProperty value) throws HsarwebException {
 		layout = new VerticalLayout();
 		layout.setCaption(prop.getLabel());
 		layout.setData(prop.getId());
+		optionLayout.clear();
 		if (value instanceof ListOfStringsProperty) {
 			ListOfStringsProperty list = (ListOfStringsProperty) value;
 			for (int idx=0 ; idx<OPTION_NAMES.length ; ++idx ) {
@@ -71,6 +62,7 @@ public class DomainOptionsPropertyFieldFactory implements PropertyFieldFactory {
 		else
 		{
 			// Eine leere Liste von Domainoptionen wird angezeigt werden.
+			throw new HsarwebException("Keine Liste: ListOfStringsProperty");
 		}
 		repaint();
 		return layout;
@@ -78,7 +70,7 @@ public class DomainOptionsPropertyFieldFactory implements PropertyFieldFactory {
 
 	@Override
 	public XmlrpcProperty getValue(PropertyConfig prop, Object component) throws HsarwebException {
-		setOptions = new ListOfStringsProperty() ; 
+		ListOfStringsProperty setOptions = new ListOfStringsProperty() ; 
 		for (int idx=0 ; idx<OPTION_NAMES.length ; ++idx ) {
 			if(Boolean.TRUE.equals(optionLayout.get(idx).getValue()))
 			{
diff --git a/hsarweb/src/de/hsadmin/web/vaadin/GenericForm.java b/hsarweb/src/de/hsadmin/web/vaadin/GenericForm.java
index e10c3b7..9cf0a27 100644
--- a/hsarweb/src/de/hsadmin/web/vaadin/GenericForm.java
+++ b/hsarweb/src/de/hsadmin/web/vaadin/GenericForm.java
@@ -33,14 +33,19 @@ public class GenericForm {
 	
 	public Form createAddForm() {
 		Form f = new Form();
-		ModuleConfig config = module.getModuleConfig();
-		f.setCaption(config.getLabel("new"));
-		Layout layout = f.getLayout();
-		for (PropertyConfig prop : config.getPropertyList()) {
-			PropertyFieldFactory propFieldFactory = prop.getPropFieldFactory();
-			if (!propFieldFactory.isReadOnly()) {
-				layout.addComponent((Component) propFieldFactory.createFieldComponent(prop, null));
+		try {
+			ModuleConfig config = module.getModuleConfig();
+			f.setCaption(config.getLabel("new"));
+			Layout layout = f.getLayout();
+			for (PropertyConfig prop : config.getPropertyList()) {
+				PropertyFieldFactory propFieldFactory = prop.getPropFieldFactory();
+				if (!propFieldFactory.isReadOnly()) {
+					layout.addComponent((Component) propFieldFactory.createFieldComponent(prop, null));
+				}
 			}
+		} catch (HsarwebException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
 		}
 		return f;
 	}
@@ -148,7 +153,10 @@ public class GenericForm {
 				Object data = ((AbstractComponent) component).getData();
 				String propName = (String) data;
 				PropertyConfig property = module.getModuleConfig().getProperty(propName);
-				map.put(propName, property.getPropFieldFactory().getValue(property, component));
+				PropertyFieldFactory fieldFactory = property.getPropFieldFactory();
+				if (!fieldFactory.isReadOnly() && !fieldFactory.isWriteOnce()) {
+					map.put(propName, property.getPropFieldFactory().getValue(property, component));
+				}
 			}
 		}
 	}