pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35704-141_Six_Little_Snails.ps) >>/Users/jc/w/tmp/Tune-35704-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EverydaySongBook/141_Six_Little_Snails.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_35704.log 978 Log file, useful mostly for debugging
Tune-35704-141_Six_Little_Snails.abc 638 ABC music file with the extracted tune(s)
Tune-35704-141_Six_Little_Snails.ps 31978 PostScript
Tune-35704-141_Six_Little_Snails.txt 638 Plain-text file with the extracted tune(s)
Tune-35704-get.log 4784 Log file, useful mostly for debugging
These files should be available for 24 hours.