HI Yesterday I was also mailed my problem but there was persons who guide me but i need more guidence to sort out that problem... so i m mailing again. I am webdevloper developing one website and using tools JSP, Servlet, and working on Jakarta-Tomcat version 3.1. I am the old user of jakarta-tomcat, so i know how to configure it properly. I m using tomcat for my website but from last 5 days, I am getting the problems what i undersatnd it is related to the buffer or context stuff but i m unbale to sort it out, so there is full description of my problem: 1>Some time it start working properly and then suddenly start give following Exception from Browser> Error: 500 Location: /examples/jsp/New/dyeing.jsp Internal Servlet Error: java.lang.NullPointerException at jsp.New._0002fjsp_0002fNew_0002fdyeing_0002ejspdyeing_jsp_0._jspService(_0002fjsp_0002fNew_0002fdyeing_0002ejspdyeing_jsp_0.java:123) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:126) at javax.servlet.http.HttpServlet.service(HttpServlet.java:588) at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:174) at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:261) at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:369) at javax.servlet.http.HttpServlet.service(HttpServlet.java:588) at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:503) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:160) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:338) at java.lang.Thread.run(Unknown Source) then i Checked the 123 line of _0002fjsp_0002fNew_0002fdyeing_0002ejspdyeing_jsp_0.java there was the following code: } catch (Exception ex) { if (out.getBufferSize() != 0) out.clearBuffer(); pageContext.handlePageException(ex); } finally { out.flush(); _jspxFactory.releasePageContext(pageContext); } OR Error: 500 Location: /examples Internal Servlet Error: java.lang.NullPointerException at org.apache.tomcat.servlets.DefaultServlet.serveFile(DefaultServlet.java:301) at org.apache.tomcat.servlets.DefaultServlet.doGet(DefaultServlet.java:218) at javax.servlet.http.HttpServlet.service(HttpServlet.java:499) at javax.servlet.http.HttpServlet.service(HttpServlet.java:588) at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java:503) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559) at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:160) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java:338) at java.lang.Thread.run(Unknown Source) then i Checked the 301 line of DefaultServlet.java there was the following code: if(absPath.indexOf("..") != -1) { // We have .. in the path... response.sendError(response.SC_NOT_FOUND); return; } 2> or very rarely it gives the following message or error> Error: 404 Location: / File Not Found / 3> or it also gives like most common message of Browser by the giving the URL> http://localhost:8080 on InternetExplorer and then suddenly start working and then again same message which is as follow> The page cannot be found bla bla bla HTTP 404 - File not found Internet Explorer The following r the configurations of My system I am using Compaq 800 MHZ of PIII, 20 GB Hard Disk, 128 MB RAM. Operating System WinNT 4 +Service Pack 5 Data Base Oracle 8 Tools JDK1.3.0_01, JSP1.1, Servlet, Jakarta-ant, JavaScript,HTML and etc Autoexec.bat Path = set PATH=%PATH%;c:\jdk13\bin;c:\java\jakarta-tomcat\bin set JAVA_HOME=c:\jdk13 set CLASSPATH=.;c:\jdk13\jre\lib\rt.jar; c:\jdk13\lib\tools.jar; c:\jdk13\lib\jsdk.jar; c:\java\jakarta-tomcat\lib\servlet.jar set ANT_HOME=c:\java\jakarta-ant set Temp=C:\Temp I will be very thanks full if you guide me that what’s going on, is there some thing wrong with product or there is some problem in my configuration. Where as I using tomcat on port 8080 and I changed it also many times but nothing happen. I installed JDK1.3 & Tomcat 10 times in these 4 days with different settings but I am still not able to sort out the problem. So again I am very hope full for positive response from your side. Thanks & Regard Naeem Malik __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/