After Upgrading 2.4 to 2.5 getting an error No emulation path

Hi,

After Upgrading 2.4 to 2.5 getting an error No emulation path.

                00:00:39.772 [ERROR] Exception initializing module

com.google.gwt.dev.jjs.InternalCompilerException: No emulation path.
	at com.google.gwt.dev.jjs.impl.GwtAstBuilder$AstVisitor.makeThisReference(GwtAstBuilder.java:2210)
	at com.google.gwt.dev.jjs.impl.GwtAstBuilder$AstVisitor.endVisit(GwtAstBuilder.java:1297)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedThisReference.traverse(QualifiedThisReference.java:127)
	at org.eclipse.jdt.internal.compiler.ast.MessageSend.traverse(MessageSend.java:564)
	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.traverse(MethodDeclaration.java:239)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1294)
	at org.eclipse.jdt.internal.compiler.ast.QualifiedAllocationExpression.traverse(QualifiedAllocationExpression.java:478)
	at org.eclipse.jdt.internal.compiler.ast.LocalDeclaration.traverse(LocalDeclaration.java:245)
	at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.traverse(MethodDeclaration.java:239)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1239)
	at com.google.gwt.dev.jjs.impl.GwtAstBuilder.process(GwtAstBuilder.java:2948)
	at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater$UnitProcessorImpl.process(CompilationStateBuilder.java:124)
	at com.google.gwt.dev.javac.JdtCompiler$CompilerImpl.process(JdtCompiler.java:247)
	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:444)
	at com.google.gwt.dev.javac.JdtCompiler.doCompile(JdtCompiler.java:718)
	at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater.compile(CompilationStateBuilder.java:248)
	at com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:463)
	at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:388)
	at com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:373)
	at com.google.gwt.dev.DevModeBase$UiBrowserWidgetHostImpl.createModuleSpaceHost(DevModeBase.java:108)
	at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:197)
	at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526)
	at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
	at java.lang.Thread.run(Unknown Source)

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