Rhapsody REST API Web Server does not return the content of Model Elements in Rhapsody using RPE Template

I am using Rhapsody 8.4 and RPE 6.0.6, when i tried to generate report using RPE template in IBM Rhapsody, getting an error 

document not generated.

When i tried to paste the Rest API server URL in web browser getting following error:

HTTP ERROR 500 Problem accessing /Rational/Rhapsody/. Reason: com/telelogic/rhapsody/core/RhapsodyAppServer.getActiveRhapsodyApplication()Lcom/telelogic/rhapsody/core/IRPApplication; Caused by: java.lang.UnsatisfiedLinkError: com/telelogic/rhapsody/core/RhapsodyAppServer.getActiveRhapsodyApplication()Lcom/telelogic/rhapsody/core/IRPApplication; at com.ibm.rational.rhapsody.rhpwebserver.ModelDataAcessServletAbs$ServletProcess.callRhapsodyApplication(Unknown Source) at com.ibm.rational.rhapsody.rhpwebserver.ModelDataAcessServletAbs$ServletProcess.doProcess_Synchronized(Unknown Source) at com.ibm.rational.rhapsody.rhpwebserver.ModelDataAcessServletAbs$ServletProcess.doProcess(Unknown Source) at com.ibm.rational.rhapsody.rhpwebserver.ModelDataAcessServletAbs.doGet(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:380) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:324) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:865) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:540) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:213) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)

Kindly help me to resolve this error