Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/session/Oivan_Ilo/Tippa-C-16-3.abc/song"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2607-song.ps) >>/Users/jc/w/tmp/Tune-2607-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/session/Oivan_Ilo/Tippa-C-16-3.abc/song

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Find_26076.log 1543 Log file, useful mostly for debugging
Tune-2607-BeggerBoy.abc 924 ABC music file with the extracted tune(s)
Tune-2607-BeggerBoy.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-2607-BeggerBoy.ps 34880 PostScript
Tune-2607-BeggerBoy.txt 924 Plain-text file with the extracted tune(s)
Tune-2607-get.log 9197 Log file, useful mostly for debugging
Tune-2607-song.abc 162 ABC music file with the extracted tune(s)
Tune-2607-song.ps 6 PostScript
Tune-2607-song.txt 162 Plain-text file with the extracted tune(s)
Tune-26079-get.log 4625 Log file, useful mostly for debugging
These files should be available for 24 hours.