Repeat problem

[Palmer, Ralph]

Greetings, All -

I'm running LilyPond 2.11.53 under Windows XP SP3. I feel more than
slightly embarrassed: I just finished the GDP rewrite of repeats, and I
cannot figure out what the problem is with this snippet. I keep getting
a "more alternatives than repeats" error. It prints to pdf, but no
second ending.

Thanks for your help,

Ralph

%%%%%%%%%%%%%% begin snippet %%%%%%%%%

%The Blue Ball & The False Proof
\version "2.11.53"
\include "english.ly"

BlueBallUp = \relative c'' {
        \clef treble
        \key d \major
        \time 6/8
        
        %Part A
        \repeat volta 2 {
                b,8 fs' e d cs a |
        }
        \alternative {
                {cs8 b a b4 a8 } |
                {cs8 b a b4.} |
        }
        
        
        %Part B
        fs'4 b,8 d cs b |
        \bar  "|."
}

\layout {
        indent = #0
        }

\score {
        \BlueBallUp
}
                
%%%%%%%%% end snippet %%%%%%%%