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SCWCD mock exam problem at javaranch

 
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I am trying to take the mock exam at the javaranch web site.
When I click the next button on the first question, I get the foll. error.
I have JDK 1.4.2 on my machine and use IE 6.0.
Has anybody seen this error before?
Do I have to enter my login details in the login page to take the mock test.
Error page Scwcd_Error
An error occured in the bean. Error Message is: null
Stack Trace is :
java.lang.NullPointerException
at com.javaranch.jspbeans.scwcd.QuizBean.execute(QuizBean.java:216)
at __jspPage18_carl_scwcd_scwcd_mock_jsp._jspService(__jspPage18_carl_scwcd_scwcd_mock_jsp.java:92)
at com.orionserver.http.OrionHttpJspPage.service(.:56)
at com.evermind._cp._vhc(.:5639)
at com.evermind.server.http.JSPServlet.service(.:31)
at com.evermind._deb._lnc(.:514)
at com.evermind._deb._wmb(.:170)
at com.evermind._co._wbb(.:581)
at com.evermind._co._fs(.:189)
at com.evermind._bt.run(.:62)
 
Vishwa Kumba
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It is working fine now.
Maybe the mock exam knows now, that I can meet up its standards
Cheers
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