File download from a GWT Service: "java.lang.RuntimeException: Unable to report failure"

[J-Pro]

Hello, dear GWT gurus!

I'm trying to send a String to the client as a file after user presses
a button. After searching I've found and doing it this way:
http://codepad.org/kbZ8Cp2V

But when I run it in GWT DEV mode, I'm getting this exception:
"java.lang.RuntimeException: Unable to report failure" (details see
here: http://codepad.org/TIGk861g)
And also, below it there is another one:
"com.google.gwt.user.client.rpc.InvocationException: File contents
" (details see here: http://codepad.org/JGIXaPCg)

I'm using smartwgt 2.2, GWT SDK 2.0.3 with Eclipse 3.5 SR1 and jdk
1.6.0 u18 from Windows 7 Enterprise x64 and Mozilla Firefox 3.5.9 as
browser.

Please, advise me something, maybe I'm just doing something wrong... I
work with file download in GWT for the first time.

Thank you in advance.

[Sripathi Krishnan]

public class MyServiceImpl extends RemoteServiceServlet implements MyService

The above line is wrong. It should NOT extend RemoteServiceServlet. Just extend the regular HttpServlet and it should work.

--Sri

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