ΧΑΡΑΚΤΗΡΕΣ

Unable to compile LilyPond input file:

Processing `.../file.ly'
Parsing...
.../file.ly:16:4: error: unknown escaped string: `\parenthesisOpenSymbol'
sol
   \parenthesisOpenSymbol \parenthesize sol\parenthesisCloseSymbol la sisd sisb
.../file.ly:16:4: error: unrecognized string, not in text script or \lyricmode
sol
   \parenthesisOpenSymbol \parenthesize sol\parenthesisCloseSymbol la sisd sisb
.../file.ly:16:44: error: unknown escaped string: `\parenthesisCloseSymbol'
sol\parenthesisOpenSymbol \parenthesize sol
                                           \parenthesisCloseSymbol la sisd sisb
.../file.ly:16:44: error: unrecognized string, not in text script or \lyricmode
sol\parenthesisOpenSymbol \parenthesize sol
                                           \parenthesisCloseSymbol la sisd sisb
Interpreting music...
Preprocessing graphical objects...
Calculating line breaks... 
Drawing systems... 
Layout output to `file.eps'...
Converting to PNG...
Layout output to `file-1.eps'...
Writing file-systems.texi...
Writing file-systems.tex...
Writing file-systems.count...
fatal error: failed files: ".../file.ly"

exited with status: 1