NullPointerException in getScopeDecider

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One user reports:

I have just installed 5.0.2 on Win XP, MySQL 5.1, and Java 1.6.

I am able to run Ontopoly, but Omnigator produces NPEs in
getScopeDecider (stack trace below) when attempting to display any of
the type indices (though the various Topic Map Overview links all work
w/o error).

ERROR 2009-10-19 22:08:48,420 [/omnigator].[jsp] - Servlet.service()
for servlet jsp threw exception
java.lang.NullPointerException
    at net.ontopia.topicmaps.nav2.utils.ScopeUtils.getScopeDecider
(ScopeUtils.java:61)
    at
net.ontopia.topicmaps.nav2.taglibs.value.BaseScopedTag.getScopeDecider
(BaseScopedTag.java:32)
    at
net.ontopia.topicmaps.nav2.taglibs.value.BaseScopedTag.getScopeFilter
(BaseScopedTag.java:41)
    at net.ontopia.topicmaps.nav2.taglibs.TMvalue.NamesTag.process
(NamesTag.java:46)
    at
net.ontopia.topicmaps.nav2.taglibs.value.BaseValueProducingAndAcceptingTag.doEnd
Tag
(BaseValueProducingAndAcceptingTag.java:63)
    at net.ontopia.utils.ontojsp.JSPPageExecuter.runTag
(JSPPageExecuter.java:114)
    at net.ontopia.utils.ontojsp.JSPPageExecuter.loopTag
(JSPPageExecuter.java:124)
    at net.ontopia.utils.ontojsp.JSPPageExecuter.runTag
(JSPPageExecuter.java:106)
    at net.ontopia.utils.ontojsp.JSPPageExecuter.loopTag
(JSPPageExecuter.java:124)
    at net.ontopia.utils.ontojsp.JSPPageExecuter.runTag
(JSPPageExecuter.java:106)
    at net.ontopia.utils.ontojsp.JSPPageExecuter.run
(JSPPageExecuter.java:
57)
    at net.ontopia.topicmaps.nav2.impl.basic.Function.call
(Function.java:
77)
    at net.ontopia.topicmaps.nav2.impl.basic.AbstractFunction.execute
(AbstractFunction.java:40)
    at net.ontopia.topicmaps.nav2.taglibs.logic.CallTag.doEndTag
(CallTag.java:80)
    at
org.apache.jsp.models.topic_005fcomplete_jsp._jspx_meth_logic_005fcall_005f1
(topic_005fcomplete_jsp.java:532)
    at
org.apache.jsp.models.topic_005fcomplete_jsp._jspx_meth_template_005fput_005f3
(topic_005fcomplete_jsp.java:488)
    at
org.apache.jsp.models.topic_005fcomplete_jsp._jspx_meth_template_005finsert_005f
0
(topic_005fcomplete_jsp.java:243)
    at org.apache.jsp.models.topic_005fcomplete_jsp._jspService
(topic_005fcomplete_jsp.java:127)
    at org.apache.jasper.runtime.HttpJspBase.service
(HttpJspBase.java:98)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:331)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:329)
    at org.apache.jasper.servlet.JspServlet.service
(JspServlet.java:265)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:172)
    at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service
(CoyoteAdapter.java:174)
    at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:875)
    at org.apache.coyote.http11.Http11BaseProtocol
$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:
665)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket
(PoolTcpEndpoint.java:528)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt
(LeaderFollowerWorkerThread.java:81)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:689)
    at java.lang.Thread.run(Thread.java:619)

Original issue reported on code.google.com by lar...@gmail.com on 20 Oct 2009 at 8:45