My current project use the RAM 7.1.1.1 and deployed in the Websphere cluster, the WAS version is 6.1.0.27. Since our application need some RAM 7.2 feature, I begin to upgrade it to RAM 7.2.

I follow the following steps somebody send to me in the upgrade document:
First, I remove all the RAM applications originally deployed in Websphere cluster.
Then, I upload the version 7.2 com.ibm.ram.repository.setup.web.ear and deployClusterSetup.py into the server, and run the following command:
cd to WAS install dir/<profiles>/Dmgr01/bin
Ex: ./wsadmin.sh -lang jython -user <username> -password <pswd> -f /tempfs/iRAM7201/deployClusterSetup.py /tempfs/iRAM7201/com.ibm.ram.repository.setup.web.ear com.ibm.ram.repository.setup.web.ear

After that, I visit the RAM setup page :
http://xxx.ibm.com:9060/ram.setup/wizard/login.jsp
I want to use my RAM WAS admin user name and password to login. But after I login, it will report Null pointer exception:
java.lang.NullPointerException
at com.ibm.ram.repository.setup.web.WASServer.getInstallPrerequisiteStatus(WASServer.java:2127)
at com.ibm.ram.repository.setup.web.access.RAMConfigurationBean.getInstallPrerequisiteStatus(RAMConfigurationBean.java:750)
at com.ibm.ram.repository.setup.web.access.RAMConfigurationBean.getSettingsSelectionStatus(RAMConfigurationBean.java:710)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.apache.commons.el.ArraySuffix.evaluate(ArraySuffix.java:314)
at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
at org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:263)
at org.apache.commons.el.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:190)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:754)
at com.ibm._jsp._index._jspx_meth_c_set_14(_index.java:902)
at com.ibm._jsp._index._jspService(_index.java:492)
at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:87)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1152)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1087)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)
at com.ibm.ram.repository.setup.web.wizard.servlets.main.SetupAssistantFilter.doFilter(SetupAssistantFilter.java:66)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:837)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:680)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:588)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:524)
at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:122)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:232)
at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3548)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:269)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:818)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:125)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:458)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:387)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1818)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:196)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:751)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:881)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1497)

Is anybody can help to check this problem? Thank you.