Probably this was not the first time
you compiled it, and a previous run's output (pdf file) was still open,
preventing writing the new one. You were just looking at the old pdf.
Happens to me frequently. Close the
pdf and re-run Lilypond on it.
Tim Reeves
>
> Interpreting music... [8]
> Preprocessing graphical objects...
> Finding the ideal number of pages...
> Fitting music on 1 page...
> Drawing systems...
> Layout output to `blues_2.ps'...
> Converting to `./blues_2.pdf'...
> error: failed files: "blues_2.ly"
>
> regards: Seppo