ListGrid.exportClientData(); is encountering error

[nk]

Hello,

I am using SmartGWT Pro 3.0p and browser is IE9.

I am getting following error when i call ListGrid.exportClientData(); method.

=========================================================
com.isomorphic.servlet.IDACall top-level exception

java.lang.ClassCastException: com.isomorphic.js.JSExpression cannot be cast to java.lang.Long
at com.isomorphic.rpc.RPCManager.parseRequest(RPCManager.java:1870)
at com.isomorphic.rpc.RPCManager.(RPCManager.java:296)
at com.isomorphic.rpc.RPCManager.(RPCManager.java:281)
at com.isomorphic.servlet.IDACall.processRequest(IDACall.java:116)
at com.isomorphic.servlet.IDACall.doPost(IDACall.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:152)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

=========================================================

Here goes console log on eclipse.

=========================================================
com.isomorphic.servlet.IDACall top-level exception

java.lang.ClassCastException: com.isomorphic.js.JSExpression cannot be cast to java.lang.Long
at com.isomorphic.rpc.RPCManager.parseRequest(RPCManager.java:1870)
at com.isomorphic.rpc.RPCManager.(RPCManager.java:296)
at com.isomorphic.rpc.RPCManager.(RPCManager.java:281)
at com.isomorphic.servlet.IDACall.processRequest(IDACall.java:116)
at com.isomorphic.servlet.IDACall.doPost(IDACall.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:152)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

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Here is contents of the web.xml

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<servlet>
<servlet-name>IDACall</servlet-name>
<servlet-class>com.isomorphic.servlet.IDACall</servlet-class>
<init-param>
<param-name>encoding</param-name>
<param-value>none</param-value>
</init-param>
</servlet>


<servlet-mapping>
<servlet-name>IDACall</servlet-name>
<url-pattern>/amkorcim_web/sc/IDACall/*</url-pattern>
</servlet-mapping>
=========================================================

Would you please advise me that how I can fix the problem?

Thanks in advance!

[Isomorphic]

This results from skipping installation steps and/or not running a GWT compile after changing <inherits>.