Problem with barcheck

[Martin Chicoine]

The following example gives me barcheck errors. Could someone explain why?

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.12.3"

\header {
        title = "" 
}

staffViolon = \new Staff {
    \time 6/8
    \set Staff.instrumentName = "Violon"
    \set Staff.midiInstrument = "violin"
    \key g \major
    \clef treble
    \relative c' {     
          b'4 d,8 ~ \times 2/3 {d8 g a } |
          \times 2/3 {b8 d c} \times 2/3 {b a g} |
    }

}

\score {
        <<
                \staffViolon
        >>
        
        \midi {
        }

        \layout {
        }
}