Phil,

I don't know what I was thinking of! I've spent about 2 hours getting this 
wrong! Several senior moments I fear.

Change the middle bit to 

         \repeat volta 2 {
            c1
          }
          \alternative {
            {
              <g, g'>
              |         %comment this out and it's OK
              <a a'>
            }
            d'1
          }

and it's OK, even without the braces round the last note.

Best regards,

Peter
mailto:[email protected]
www.ptoye.com

-------------------------
Monday, November 28, 2016, 3:01:40 PM, you wrote:


I wasn't certain, so I looked in the Notation Reference.  It says "Each group 
of alternatives must be themselves, enclosed in a set of braces."

--
Phil Holmes
 
 
----- Original Message ----- 
From: Peter Toye
To: [email protected]
Sent: Monday, November 28, 2016 2:51 PM
Subject: Odd interaction berween \alternative and bar line

The snippet below gives an error:

warning: More alternatives than repeats.  Junking excess alternatives
Interpreting music...
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
programming error: Spanner `VoltaBracket' is not fully contained in parent 
spanner.  Ignoring orphaned part
continuing, cross fingers

Comment out the bar line and it's OK. Anyone any idea what's going on?

\version "2.18.2"

\language "english"

\score {
   \new PianoStaff  <<
     \new Staff = "lh"
     {
       \clef bass
       \relative c
       {
         \repeat volta 2 {
           c1
         }
         \alternative {
           <g, g'> 
          |        %comment this out and it's OK
           <a a'>
         }
         d'1
       }
     }
   >>
}

Regards,

Peter
mailto:[email protected]
www.ptoye.com 

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