pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-96164-2173_John_Howats_Reel.ps) >>/Users/jc/w/tmp/Tune-96164-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kerr/MM2/2173_John_Howats_Reel.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-96164-2173_John_Howats_Reel.abc 462 ABC music file with the extracted tune(s)
Tune-96164-2173_John_Howats_Reel.ps 34385 PostScript
Tune-96164-2173_John_Howats_Reel.txt 462 Plain-text file with the extracted tune(s)
Tune-96164-get.log 7661 Log file, useful mostly for debugging
These files should be available for 24 hours.