GWT Exception while rendering a SamrtGWT UI

Hi Team,

I am using GWT 2.7.0 and SamrtGWT 12.1 LGPL,

I am getting below exception while rendering one of the screen,

com.google.gwt.core.client.JavaScriptException: (TypeError) @com.google.gwt.core.client.impl.Impl::apply(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)([JavaScript object(9468), JavaScript object(7154), JavaScript object(20211)]): _1 is undefined
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:252)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:137)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:589)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:293)
    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:299)
    at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
    at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:72)
    at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
    at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:341)
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:222)
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:137)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:589)
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:315)
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
    at com.smartgwt.client.widgets.BaseWidget.setProperty(BaseWidget.java)
    at com.smartgwt.client.widgets.BaseWidget.setAttribute(BaseWidget.java:1194)
    at com.smartgwt.client.widgets.grid.ListGrid.setFields(ListGrid.java:6523)

In chrome's debug console, it is giving below error,

com.google.gwt.core.client.JavaScriptException: (TypeError) : Cannot read property 'name' of undefined

Can you help me figure out where exactly the issue is ? SmartGWT's debugger console is not showing any error.

Please note that it is working fine with GWT 2.7.0 and SmartGWT 4.1. I am doing an upgrade where it is failing.

Thanks in advance.

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