Can't embed font for chord changes

[Patrick Karl]

I am unable to compile the following file:

> \version "2.12.3"
> 
> melody = \relative c' { s4 fis4 fis8 e4. }
> 
> harmonies = \chordmode { a1:7 }
> 
> \score {
>        <<
>                       \new ChordNames {
>                               \set chordChanges = ##t
>                               \harmonies
>                       }
>                       \new Voice = "one" \melody
>               >>
> }

The log file says:

> Processing 
> `/Users/pat/Documents/LilyPond/Examples_and_Tests/cant_embed_font.ly'
> Parsing...
> Interpreting music... 
> Preprocessing graphical objects...
> Finding the ideal number of pages...
> Fitting music on 1 page...
> Drawing systems...
> Layout output to `cant_embed_font.ps'...
> warning: do not know how to embed 
> "BitstreamVeraSans-Roman"="/Library/Fonts/Vera.tff"
> Converting to `./cant_embed_font.pdf'...
> `gs -q -dSAFER -dDEVICEWIDTHPOINTS=595.28 -dDEVICEHEIGHTPOINTS=841.89 
> -dCompatibilityLevel=1.4 -dNOPAUSE -dBATCH -r1200 -sDEVICE=pdfwrite 
> -sOutputFile="./cant_embed_font.pdf" -c .setpdfwrite -f "cant_embed_font.ps"' 
> failed (256)
> error: failed files: 
> "/Users/pat/Documents/LilyPond/Examples_and_Tests/cant_embed_font.ly"
> Processing time: 0 seconds

Thanks,
Pat Karl