Problem with executing processcomments.rb for the vtest

[kujunguo kujunguo]

I ran the command but met error:
C:\SOA\Tuscany\vtest>ruby processcomments.rb > results.txt
processcomments.rb:63:in `<=>': undefined method `<=>' for nil:NilClass
(NoMetho
dError)
        from processcomments.rb:195:in `sort'
        from processcomments.rb:195

How to modify this script? Thanks.