pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21851-048_John_Anderson_My_Jo.ps) >>/Users/jc/w/tmp/Tune-21851-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Chappell/048_John_Anderson_My_Jo.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-21851-048_John_Anderson_My_Jo.abc 600 ABC music file with the extracted tune(s)
Tune-21851-048_John_Anderson_My_Jo.ps 34460 PostScript
Tune-21851-048_John_Anderson_My_Jo.txt 600 Plain-text file with the extracted tune(s)
Tune-21851-get.log 4716 Log file, useful mostly for debugging
These files should be available for 24 hours.