WebHelp - Exception when building

[Marc Boorshtein <mboorshtein@gmail.com>]

I'm trying to get webhelp working but am hitting a snag.  When I try
to run webhelp on the test xml I get the following exception:


/home/mlb/workspace-x1/AutoIDM-Trunk/dist/doc/manual/prelude/docbook-xsl-1.77.1/webhelp/build.xml:61:
javax.xml.transform.TransformerException:
java.lang.NullPointerException
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:732)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:336)
	at org.apache.tools.ant.taskdefs.optional.TraXLiaison.transform(TraXLiaison.java:195)
	at org.apache.tools.ant.taskdefs.XSLTProcess.process(XSLTProcess.java:853)
	at org.apache.tools.ant.taskdefs.XSLTProcess.execute(XSLTProcess.java:389)
	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
	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:597)
	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
	at org.apache.tools.ant.Task.perform(Task.java:348)
	at org.apache.tools.ant.Target.execute(Target.java:392)
	at org.apache.tools.ant.Target.performTasks(Target.java:413)
	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
	at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
	at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
	at org.apache.tools.ant.Main.runBuild(Main.java:811)
	at org.apache.tools.ant.Main.startAnt(Main.java:217)
	at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
	at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.NullPointerException
	at com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary.referenceToNodeSet(BasisLibrary.java:998)
	at webhelp.l10n$dot$language()
	at webhelp.topLevel()
	at webhelp.transform()
	at com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet.transform(AbstractTranslet.java:605)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:725)
	... 21 more
---------
java.lang.NullPointerException
	at com.sun.org.apache.xalan.internal.xsltc.runtime.BasisLibrary.referenceToNodeSet(BasisLibrary.java:998)
	at webhelp.l10n$dot$language()
	at webhelp.topLevel()
	at webhelp.transform()
	at com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet.transform(AbstractTranslet.java:605)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:725)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:336)
	at org.apache.tools.ant.taskdefs.optional.TraXLiaison.transform(TraXLiaison.java:195)
	at org.apache.tools.ant.taskdefs.XSLTProcess.process(XSLTProcess.java:853)
	at org.apache.tools.ant.taskdefs.XSLTProcess.execute(XSLTProcess.java:389)
	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
	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:597)
	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
	at org.apache.tools.ant.Task.perform(Task.java:348)
	at org.apache.tools.ant.Target.execute(Target.java:392)
	at org.apache.tools.ant.Target.performTasks(Target.java:413)
	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
	at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
	at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
	at org.apache.tools.ant.Main.runBuild(Main.java:811)
	at org.apache.tools.ant.Main.startAnt(Main.java:217)
	at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
	at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

I'm using xsl-1.77.1.  I found a message on this list from february
that said try the snapshot, but 1.77.1 is from June and I didn't see
any other resolution.  Any help would be greatly appreciated.

Thanks
Marc