If you read 
http://lilypond.org/doc/v2.18/Documentation/notation/special-rhythmic-concerns#grace-notes
 - specifically Known issues and warnings, you'll see that you need to have 
equal length grace notes or rests in all parts.  This can be done with spacer 
rests.  The second bar of clarinet 2 should be:

\grace s8 d''8 r8 \grace s8 d''8 r8 r4 |



--
Phil Holmes


  ----- Original Message ----- 
  From: Bill Kone 
  To: [email protected] 
  Sent: Tuesday, April 04, 2017 6:36 AM
  Subject: Double Bar with Grace Notes Problem


  I have a lot of concert/marching band music some of which is old hand written 
manuscript. From time-to-time  I try to transcribe the hand-written manuscript 
to a much more readable  product.

  Generally I do each instrument then combine them into a score.

   

  The problem is, in this case as shown in the sample below and attached image, 
that a double bar before the grace notes, on the clarinet 1 and 2  seems to 
cause a separate bar line, which also increments the measure counter, but only 
on the score.

   

  Below is an extraction as a two staff script (the same as when each 
independent part is combined into a score). Each part needs to have the same 
bar markings so I can't just leave the double bar out on a couple of parts.

   

  In this case I just took the double bars out completely from all the parts 
but I am still wondering if it is my ignorance or what seems to me to be a bug. 

   

  In the attached script, by commenting out the double bar in the clarinet2 
staff the problem goes away on the conductor's score but of course now the 
clarinet2 part has a missing double bar.

   

  I tried creating a variable defined as:  dblbar= { \bar "||" } then on the 
conductor score defined it as: dlbar = {} for all but the top line of the 
conductor's score in this case the flute. I believe it might work but made 
management more difficult for something that I figured I was doing wrong.


  Any thoughts?

   

  See also attached image

   

  \version "2.18.2"

   

  \score{

    \new GrandStaff <<

      

      \new Staff = "Clarinet1" 

      {

        \set Staff.instrumentName = #"Clar1"

        \time 3/4

        g''8 r8 g8 r8 r4 |

        \bar "||" 

        \grace {g'16 ( b'16} d''8 )

        r8\grace {g'16 ( b'16} d''8 ) r8 r4 |

      }

      

      

      \new Staff = "clarinet2" 

      {

        \set Staff.instrumentName = \markup { Clar2 }

        \time 3/4

        g''8 r8 g8 r8 r4 |

        

        % -- If I comment out this bar formats OK

        \bar "||" 

        % ------------------------------

        

        d''8 r8 d''8 r8 r4 |

      }

    >>

    \layout{}

  }



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