WEB2792 : Help me to fix this

I'm working on Sun One Web Server 6.1 and got following Error. Please help me to fix this.

trying to GET /fopservlet, service-j2ee reports: StandardWrapperValve[FOPServlet]:WEB2792: Servlet.service() for servlet FOPServlet threw exception

java.lang.NullPointerException

at com.gxs.fop.servlet.FopServlet.doPost(FopServlet.java:112)

at com.gxs.fop.servlet.FopServlet.doGet(FopServlet.java:39)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:787)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:908)

at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrap perValve.java:771)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 322)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java: 212)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:209)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)

at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java: 161)

at com.iplanet.ias.web.WebContainer.service(WebContainer.java:580)

[1530 byte] By [omasampatha] at [2007-11-27 5:04:03]
# 1
You will need to examine the source code of FopServlet.java (line 112) to trace what is causing the NPE.
Arvind_Srinivasana at 2007-7-12 10:22:17 > top of Java-index,Web & Directory Servers,Web Servers...