Re: bug report

[Colin Campbell]

On 11/05/2013 12:34 AM, Mario Bolognani wrote:
> Version 2.16.2 and 2.17.95 do not compile correctly
> staffs are are not separated as specified.
>
> Sorry for the long annex, but it’s difficult for me to isolate the bug. Suspect 
> it is in the type of fractions used with the feature “times”.

In order for us to help you, Mario, we need something we call a "Tiny 
Example". On the website, at 
http://lilypond.org/doc/v2.17/Documentation/web/tiny-examples we show 
what helps us most.

For your problem, you should begin by doing the following:
    First, make a copy of your score and put it in a safe place!
    Next, if you think you might know what causes the problem, try a 
small change to just that area, rerun lilypond and see what changed.
    If that doesn't give the answer, begin removing sections of your 
score, one by one, until the problem stops.
    When you find the section which causes the problem, try making a 
score with just that section.
    If that shows  the problem reliably, then start taking out parts, 
by shortening the music to a few bars, until the problem goes away.
    Finally, you will have reduced your score to just the things needed 
to show your problem.
The last step will be to go to 
http://lilypond.org/doc/v2.17/Documentation/web/bug-reports and follow 
the steps there.

In looking over your files, I see you are making a lot of changes to 
spacing, particularly system-system values, and perhaps this is the 
cause of your problems starting around measure 89. Because there has 
been a lot of work done in the spacing mechanisms of LilyPond since 
version 2.16, and the latest development version 2.17.96 is very close 
to the next stable release, it would probably be a good idea for you to 
upgrade your LilyPond to 2.17.95, and to read the sections in the 
documentation which deal with spacing, quite carefully.

As a final thought, and a friendly nod to the people who develop and 
support Frescobaldi: the latest version has the ability to show the 
various spacing values in a preview mode, among other, quite wonderful 
ways of inspecting your work. Frescobaldi has been my favourite LilyPond 
editor for years, and it just gets better and better at helping me find 
my problems.

Cheers,
Colin

--
I've learned that you shouldn't go through life with a catcher's mitt on both 
hands.
You need to be able to throw something back.
-Maya Angelou, poet (1928- )