I upgraded Java to version 1.5, and installed the jaxp_parser_impl RPM, and that has reduced my error message to this:
/usr/bin/build-classpath: error: could not find xml-commons-apis Java extension for this JVM
/usr/bin/build-classpath: error: All specified jars were not found
Unknown argument: -cp
When I search for the xml-commons-apis, I find RPMs for Mandriva and Connectiva (on rpmfind.net). I'm guessing I shouldn't use these on a RedHat distribution. Any suggestions on what I should do?