Index: lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ClassCellEditor.java
diff -u lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ClassCellEditor.java:1.1.1.1 lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ClassCellEditor.java:1.2
--- lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ClassCellEditor.java:1.1.1.1	Sun Mar 16 00:19:56 2008
+++ lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ClassCellEditor.java	Sun Mar 23 22:29:32 2008
@@ -57,12 +57,13 @@
             return null;
         }
         Converter converter = ConverterUtil.getConverter(Class.class);
-        if (converter != null) {
-            return converter.convert(Class.class, o);
-        }
+
         try {
+            if (converter != null) {
+                return converter.convert(Class.class, o);
+            }
             o =Class.forName(o+"");
-        } catch (ClassNotFoundException e) {
+        } catch (Exception e) {
             o=null;
         }
         return o;

Index: lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ConfigTableModel.java
diff -u lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ConfigTableModel.java:1.2 lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ConfigTableModel.java:1.3
--- lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ConfigTableModel.java:1.2	Sun Mar 23 20:41:32 2008
+++ lutincommandline-ui/src/uimodel/org/codelutin/option/ui/ConfigTableModel.java	Sun Mar 23 22:29:32 2008
@@ -212,7 +212,7 @@
         ConfigPropertyKey<?> key = getKey(row);
         Object val;
 
-        if (key.getType() ==aValue.getClass()) {
+        if (aValue==null || key.getType() ==aValue.getClass()) {
             // we have directly the value, no conversion need
             val = aValue;
         } else {