pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-95403-Moderation.ps) >>/Users/jc/w/tmp/Tune-95403-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnWalsh/Moderation.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-95403-Moderation.abc 1203 ABC music file with the extracted tune(s)
Tune-95403-Moderation.ps 33857 PostScript
Tune-95403-Moderation.txt 1203 Plain-text file with the extracted tune(s)
Tune-95403-get.log 4432 Log file, useful mostly for debugging
These files should be available for 24 hours.