warning: Cannot find Voice: A

[Erik Sandberg]

This score, which seems correct to me, gives a couple of "warning: Cannot find 
Voice: A" warnings (one for each c16). The output looks as expected, and 
there seems to be no reason for this warning to be displayed.

\version "2.1.19"
\score {
  <<
  \new Staff \context Voice = A \notes f1
  \lyricsto A \context LyricsVoice = A \lyrics a
  \new Staff \notes {R1 c16 c c c c c c c}
  >>
}