pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54125-078_Happy_times.ps) >>/Users/jc/w/tmp/Tune-54125-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Straight_Skillern/078_Happy_times.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-54125-078_Happy_times.abc 705 ABC music file with the extracted tune(s)
Tune-54125-078_Happy_times.ps 32889 PostScript
Tune-54125-078_Happy_times.txt 705 Plain-text file with the extracted tune(s)
Tune-54125-get.log 4677 Log file, useful mostly for debugging
These files should be available for 24 hours.