pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57257-167_Pretty_Birdlings.ps) >>/Users/jc/w/tmp/Tune-57257-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EverydaySongBook/167_Pretty_Birdlings.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_57257.log 829 Log file, useful mostly for debugging
Tune-57257-167_Pretty_Birdlings.abc 1223 ABC music file with the extracted tune(s)
Tune-57257-167_Pretty_Birdlings.ps 36161 PostScript
Tune-57257-167_Pretty_Birdlings.txt 1223 Plain-text file with the extracted tune(s)
Tune-57257-get.log 4755 Log file, useful mostly for debugging
These files should be available for 24 hours.