Error!!

java.lang.NullPointerException
	at com.fujitsu.iliswing.opc.IopcItiranOperation.getItiranByKskfile(IopcItiranOperation.java:143)
	at com.fujitsu.iliswing.opc.IopcOperation.getItiranData(IopcOperation.java:5485)
	at com.fujitsu.iliswing.opc.IopcOperation.doCommon(IopcOperation.java:729)
	at com.fujitsu.iliswing.opc.IopcServletWithoutEJB.doGet(IopcServletWithoutEJB.java:225)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.fujitsu.interstage.jservlet.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:816)
	at com.fujitsu.interstage.jservlet.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:906)
	at com.fujitsu.interstage.jservlet.tomcat.servlets.InvokerServlet.service(InvokerServlet.java:277)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.fujitsu.interstage.jservlet.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:816)
	at com.fujitsu.interstage.jservlet.tomcat.core.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:237)
	at com.fujitsu.interstage.jservlet.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:913)
	at com.fujitsu.jsp.itiran$jsp._jspService(itiran$jsp.java:268)
	at com.fujitsu.interstage.jservlet.jasper.runtime.HttpJspBase.service(HttpJspBase.java:138)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.fujitsu.interstage.jservlet.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:297)
	at com.fujitsu.interstage.jservlet.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:485)
	at com.fujitsu.interstage.jservlet.jasper.servlet.JspServlet.service(JspServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.fujitsu.interstage.jservlet.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:816)
	at com.fujitsu.interstage.jservlet.tomcat.core.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:237)
	at com.fujitsu.interstage.jservlet.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:913)
	at com.fujitsu.jsp.itiranrequest$jsp._jspService(itiranrequest$jsp.java:178)
	at com.fujitsu.interstage.jservlet.jasper.runtime.HttpJspBase.service(HttpJspBase.java:138)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.fujitsu.interstage.jservlet.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:297)
	at com.fujitsu.interstage.jservlet.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:485)
	at com.fujitsu.interstage.jservlet.jasper.servlet.JspServlet.service(JspServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.fujitsu.interstage.jservlet.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:816)
	at com.fujitsu.interstage.jservlet.tomcat.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:238)
	at com.fujitsu.interstage.jservlet.tomcat.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:158)
	at com.fujitsu.interstage.jservlet.tomcat.core.FilterInvoker.invoke(FilterInvoker.java:62)
	at com.fujitsu.interstage.jservlet.tomcat.core.ContextManager.service(ContextManager.java:912)
	at com.fujitsu.interstage.jservlet.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:289)
	at com.fujitsu.interstage.jservlet.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:434)
	at java.lang.Thread.run(Thread.java:479)