Re: Error message

[DJF]

> On Jun 23, 2019, at 1:38 AM, Craig Dabelstein <address@hidden> wrote:
> 
> Hi Lilyponders,
> 
> Can anyone tell me what this error message means when trying to compile a 
> file?
> 
> Drawing 
> systems.../home/gub/NewGub/gub/target/darwin-x86/src/lilypond-git.sv.gnu.org--lilypond.git-stable-2.20/flower/include/drul-array.hh:35:
>  failed assertion `d == 1 || d == -1'
> Exited with exit status 1.

This is my least favorite kind of error! Whenever I have these, it often 
concerns beaming, especially when LP is trying to beam more than two notes but, 
because of a misplaced octave or perhaps a clef change, it can't draw a 
satisfactory beam. Sometimes, just turning off beaming in 4s can allow the file 
to compile so that you can start investigating. 

http://lilypond.org/doc/v2.19/Documentation/notation/beams.en.html

If that doesn't work, and if the file has been compiling fine right along, I'll 
assume the issue has to do with the part most recently entered. I'll stick a %} 
at the end of the part and then pick a reasonable point to put a %{ and, with 
that section now "turned off", I'll see if the piece can compile. If not, I 
keep moving the %{ earlier and earlier until it does.

Hope this helps,

Dan