pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35858-471_Volatile.ps) >>/Users/jc/w/tmp/Tune-35858-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1776/Thompson/471_Volatile.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-35858-471_Volatile.abc 1036 ABC music file with the extracted tune(s)
Tune-35858-471_Volatile.ps 36836 PostScript
Tune-35858-471_Volatile.txt 1036 Plain-text file with the extracted tune(s)
Tune-35858-get.log 4520 Log file, useful mostly for debugging
These files should be available for 24 hours.