Hi Frederico,
what you gave us is not a minimal working (compilable) example.
I suggest something like this
\version "2.19.52"
\language "deutsch"
RH= \relative c'' {
\time 4/4
\key c \major
\repeat unfold 20 c4
}
LH = \relative c {
\clef bass
\key c \major
\repeat unfold 20 c
}
Struktur =
{
%\override Score.NonMusicalPaperColumn.page-break-permission = ##f
%\override Score.SpacingSpanner.base-shortest-duration = #(ly:make-moment 1/8)
%\override NonMusicalPaperColumn.line-break-permission = ##f
s4 * 8 \break
}
\score
{
\new PianoStaff
<<
\new Staff="up"
<<
\new Voice \RH
%% \new Voice \RHii %% add other Voices here
>>
\new Staff="down"
<<
\new Voice \LH
\new NullVoice \Struktur
>>
>>
}