NullPointerException

[Mark Fenbers <ma...@noaa.gov>]

Greetings!

Attached is a snippet from solrconfig.xml pertaining to my spellcheck 
efforts.  When I use the Admin UI (v5.3.0), and check the 
spellcheck.build box, I get a NullPointerException stacktrace.  The 
actual stacktrace is at the bottom of the attachment.  The 
FileBasedSpellChecker.build is clearly the problem, but I cannot figure 
out why.  /usr/share/dict/words exists and has global read permissions.  
I displayed the file and see no issues (i.e., one word per line) 
although some "words" are a string of digits, but that shouldn't matter.

Does my snippet give any clues about why I would get this error? Is my 
stripped down configuration missing something, perhaps?

Mark