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net.jforum.exceptions.ForumStartupException: Error while starting JForum - java.lang.NullPointerExce

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I am running JForum on Tomcat 5.5. When I try to access the Jforum application after I deploy it, I am getting the below exception and am not able to access any page.
Any pointers to the reason for this and how to fix this would be appreciated. I am running tomcat on WindowsXP.

net.jforum.exceptions.ForumStartupException: Error while starting JForum - java.lang.NullPointerException
at com.trend.iwss.jscan.appscan.runtime.PolicyRuntime.getB64StrProp(PolicyRuntime.java:188 )
at com.trend.iwss.jscan.appscan.runtime.PolicyRuntime.<init>(PolicyRuntime.java:91)
at com.trend.iwss.jscan.appscan.runtime.FileIOPolicyRuntime.<init>(FileIOPolicyRuntime.java:159)
at com.trend.iwss.jscan.appscan.runtime.FileIOPolicyRuntime$Factory.make(FileIOPolicyRuntime.java:449)
at com.trend.iwss.jscan.appscan.runtime.PolicyRuntime.accessInstance(PolicyRuntime.java:225)
at com.trend.iwss.jscan.appscan.runtime.PolicyRuntime.preFilter(PolicyRuntime.java:127)
at com.trend.iwss.jscan.appscan.runtime.FileIOPolicyRuntime.preFilter(FileIOPolicyRuntime.java:166)
at net.jforum.util.preferences.SystemGlobals.loadDefaults(SystemGlobals.java:161)
at net.jforum.util.preferences.SystemGlobals.buildSystem(SystemGlobals.java:117)
at net.jforum.util.preferences.SystemGlobals.initGlobals(SystemGlobals.java:102)
at net.jforum.ConfigLoader.startSystemglobals(ConfigLoader.java:89)
at net.jforum.JForumBaseServlet.init(JForumBaseServlet.java:104)
at net.jforum.InstallServlet.init(InstallServlet.java:73)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:757)
[originally posted on jforum.net by svarghese]
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