NullPointerException의 일반적인 자바의 에러입니다.

아래 소스 라인을 확인해 보시기 바랍니다.
at kr.co.ktp.nis.cmd.auth.LoginCMD.execute(LoginCMD.java:28)

감사합니다.

>혹시 에러메시지만 가지고 원인을 알 수 있을까요?
>답변 부탁드립니다.
>
>--------------------------------------------------
>
>java.lang.NullPointerException : null
>    at com.shift.framework.model.IXyncModelSetImpl.ixyncBinding(IXyncModelSetImpl.java:267)
>    at com.shift.framework.model.IXyncModelSetImpl.bind(IXyncModelSetImpl.java:175)
>    at com.shift.framework.model.IXyncModelSetImpl.bind(IXyncModelSetImpl.java:213)
>    at com.shift.framework.model.IXyncModelSetProxy.invokeModelSet(IXyncModelSetProxy.java:209)
>    at com.shift.framework.model.IXyncModelSetProxy.invoke(IXyncModelSetProxy.java:243)
>    at $Proxy1.bind(Unknown Source)
>    at kr.co.ktp.nis.cmd.auth.LoginCMD.execute(LoginCMD.java:28)
>    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>    at java.lang.reflect.Method.invoke(Method.java:585)
>    at com.shift.framework.proxy.ServiceProxy.execute(ServiceProxy.java:133)
>    at com.shift.framework.proxy.ServiceProxy.invoke(ServiceProxy.java:111)
>    at $Proxy0.execute(Unknown Source)
>    at com.shift.framework.connector.ServiceControllerFactory.handleRequest(ServiceControllerFactory.java:208)
>    at com.shift.framework.servlet.WebController.doPost(WebController.java:126)
>    at com.shift.framework.servlet.WebController.doGet(WebController.java:101)
>    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
>    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>    at com.ixync.filter.IXyncFilter.doFilter(Unknown Source)
>    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
>    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
>    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
>    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
>    at java.lang.Thread.run(Thread.java:595)