My projects can run in the GWTDesginer's application, but it can't run
When project compiles.

Build project to WAR files, and put it to tomcat.

run and catch this exception in tomcat. I can't find the error what
lead to such.

严重: Exception while dispatching incoming RPC call
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
        at java.util.ArrayList.RangeCheck(Unknown Source)
        at java.util.ArrayList.get(Unknown Source)
        at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.extract
(ServerSerializationStreamReader.java:610)
        at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.readInt
(ServerSerializationStreamReader.java:427)
        at
com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.prepareToRead
(AbstractSerializationStreamReader.java:38)
        at
com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead
(ServerSerializationStreamReader.java:382)
        at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:234)
        at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
(RemoteServiceServlet.java:162)
        at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost
(RemoteServiceServlet.java:85)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:175)
        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service
(CoyoteAdapter.java:286)
        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:844)
        at org.apache.coyote.http11.Http11Protocol
$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:
447)
        at java.lang.Thread.run(Unknown Source)

if somebody should be tell me the error, thanks to you.
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