The file changes; lilypond doesn't notice

[Marcus Macauley]

I'm using Lilypond 2.9.17 on Gentoo Linux, with jEdit 4.3pre6 and  
LilypondTool 2.8.

Sometimes when I make a change or a few changes to the score (and save the  
file, of course) and then run Lilypond again (from within jEdit, using  
LilypondTool), it doesn't notice my changes, and simply outputs the  
following:

Processing `/my/lilypond/file.ly'
Parsing...
Interpreting music...
Processing time: 1 seconds

When this happens, I can often force it to "take another look" by adding  
or commenting out a line which makes a major change, or causes a syntax  
error, or something like that. But sometimes (like now) I find myself just  
stuck. I'll add fourteen open braces to the beginning in the middle of the  
score block, run Lilypond again, and it acts as if nothing has changed and  
everything is normal.

Has anyone else experienced this problem? Is it a Lilypond problem or a  
LilypondTool problem? Any suggestions for how to fix it, or how to  
circumvent it, i.e. how to "refresh" Lilypond (short of saving my file  
under a new name)?

BTW, I've noticed that sometimes the .ly file I'm working on also has a  
.log file in the same directory, so deleting that "refreshes" Lilypond.  
But sometimes (like now) there is no .log file to be found.

And also, BTW, I haven't changed any of the LilypondTool configuration  
settings in jEdit. The Lilypond command is listed simply as "lilypond".

Thanks,
Marcus