Here's the stack trace from the log file:

2009-06-07 19:35:59,890 ERROR [STDERR] java.lang.NullPointerException
2009-06-07 19:35:59,890 ERROR [STDERR]     at net.sf.saxon.Configuration.init(Configuration.java:303)
2009-06-07 19:35:59,890 ERROR [STDERR]     at net.sf.saxon.Configuration.<init>(Configuration.java:267)
2009-06-07 19:35:59,890 ERROR [STDERR]     at net.sf.saxon.xqj.SaxonXQDataSource.<init>(SaxonXQDataSource.java:40)

I'm getting the following error message on occasion,

"Could not load com.saxonica.validate.SchemaAwareConfiguration"

after calling the no-argument 'SaxonXQDataSource' constructor, i.e.

XQDataSource xqjd = new SaxonXQDataSource();

Any ideas as to how to resolve this?