IllegalArgumentException while using MultiComboBoxItem. getValue() method

Hi Isomorphic,

While using MultiComboBoxItem we are getting the below exception. As soon as we call MultiComboBoxItem. getValue() method, application throws IllegalArgumentException .Can you please suggest any work-around solution for this issue?

We are using SmartGWT 4.1 version (latest nightly build) & GWT 2.5

Sample Code:
===========

private DynamicForm languagePanel;
private MultiComboBoxItem language;
private VLayout langLayout;

languagePanel = new DynamicForm();

language = new MultiComboBoxItem("languageId");
language.setDisplayField("codeName"); // CodeName is String field
language.setValueField("codeListId"); // codeListId is number field
ComboBoxItem combo = new ComboBoxItem();
language.setOptionDataSource(DataSource.get("codeListDataSource"));

Criteria criteria = new Criteria("codeListTypeId", TitleEditorGenericConstants.LANGUAGE);
combo.setPickListCriteria(criteria);
language.setAutoFetchData(true);
language.setComboBoxProperties(combo);

languagePanel.setFields(language);

langLayout.addMember(languagePanel);

// FormItem.getValue() is invoked
String languageList = languagePanel.getField("languageId").getValue();

Error:
=====

00:05:41.625 [ERROR] Uncaught exception escaped
java.lang.IllegalArgumentException: invoke arguments: JS value of type int, expected java.lang.Object
at com.google.gwt.dev.shell.JsValueGlue.get(JsValueGlue.java:178)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:65)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.smartgwt.client.widgets.form.fields.FormItem._getValue(FormItem.java)
at com.smartgwt.client.widgets.form.fields.FormItem.getValue(FormItem.java:6285)
at com.nielsen.book.titleeditor.client.add.LanguagePageTab.getLanguageData(LanguagePageTab.java:744)
at com.nielsen.book.titleeditor.client.add.LanguagePageTab.access$5(LanguagePageTab.java:715)
at com.nielsen.book.titleeditor.client.add.LanguagePageTab$3.execute(LanguagePageTab.java:334)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Unknown Source)

Thanks & Regards,
Pradnya