Re: Error message using AikenHeads with NullVoice

[David Wright]

On Wed 06 Jul 2022 at 11:56:52 (-0600), David F. wrote:
> [ … ]
> The command to use aikenHeads comes from a separate style file that gets 
> included for each hymn.  But there is an unfortunate interaction between 
> aikenHeads and NullVoice: Lilypond outputs the following error message:
> 
> programming error: must have stem dir for note head
> continuing, cross fingers
> 
> And it outputs a lot of these messages.  I need to find a way to stop 
> Lilypond from outputting this error.  Any kind of quick fix or hack would be 
> sufficient.

$ lilypond source-file.ly |& tee /tmp/complete-errors | grep -v 'programming 
error: must have stem dir for note head' | grep -v 'continuing, cross fingers'

Is this hackish enough? The unfiltered errors are available
for consultation in /tmp/complete-errors. I would need sed
rather than grep to filter out the second line only when
preceded by this particular first line.

Cheers,
David.