--- a/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/ParameterMatrixPanel.java	Thu Mar 20 13:36:20 2014 +0100
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/ParameterMatrixPanel.java	Thu Mar 20 13:36:59 2014 +0100
@@ -23,6 +23,7 @@
 import org.dive4elements.river.client.shared.model.DefaultData;
 import org.dive4elements.river.client.shared.model.DefaultDataItem;
 import org.dive4elements.river.client.shared.model.IntegerOptionsData;
+import org.dive4elements.river.client.shared.model.MultiAttributeData;
 import org.dive4elements.river.client.shared.model.StringOptionsData;
 
 import java.util.ArrayList;
@@ -169,6 +170,9 @@
             else if (data instanceof StringOptionsData) {
                 matrix.addColumn((StringOptionsData) data);
             }
+            else if (data instanceof MultiAttributeData) {
+                matrix.addColumn((MultiAttributeData)data);
+            }
         }
 
         // If too many items are shown, show it in the helper Panel.