java.lang.NullPointerException: This exception has no message.
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java.lang.NullPointerException:at org.pentaho.di.trans.Trans.prepareExecution(Trans.java:913)at org.pentaho.di.www.PrepareExecutionTransServlet.doGet(PrepareExecutionTransServlet.java:217)at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:522)at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)at org.eclipse.jetty.server.Server.handle(Server.java:370)at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)at org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)at org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)at org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.run(SocketConnector.java:264)at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)at java.lang.Thread.run(Thread.java:745)