Difficulties getting Grammar objects with VerifyError

[es...@imap3.asu.edu]

I'm getting VerifyError's trying using the example xni.GrammarBuilder that was 
given with the source code.  The lines below from the sample will also give the 
same result:

SymbolTable sym = new SymbolTable(BIG_PRIME);
XMLGrammarPreparser preparser = new XMLGrammarPreparser(sym);
XMLGrammarPoolImpl grammarPool = new XMLGrammarPoolImpl();
preparser.registerPreparser(XMLGrammarDescription.XML_SCHEMA, null);

Is there some feature or property I am supposed to set somewhere?  And if so, 
which ones?  I'm not intending to use the schema for validation;  I just want 
to access the XSGrammar datastructures from the Grammar object.
Or perhaps a different question: Is there some other way to get a SchemaGrammar 
or Grammar object?  I've looked in the faq's but am still running into dead 
ends.

Thanks in advance
Eric 



Exception in thread "main" java.lang.VerifyError: (class: org/apache/xerces/imp
/xs/traversers/XSDHandler, method: getSchema signature: (Ljava/lang/String;Lorg
apache/xerces/xni/parser/XMLInputSource;ZSLorg/w3c/dom/Element;)Lorg/w3c/dom/Do
ument;) Incompatible object argument for function call
        at org.apache.xerces.impl.xs.XMLSchemaLoader.<init>(XMLSchemaLoader.jav
:237)
        at org.apache.xerces.impl.xs.XMLSchemaLoader.<init>(XMLSchemaLoader.jav
:199)
        at newesttest.main(newesttest.java:5)

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