pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2139-Plow_Boy-G-16-4.ps) >>/Users/jc/w/tmp/Tune-2139-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ONeills/reel/Plow_Boy-G-16-4.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_21390.log 271686 Log file, useful mostly for debugging
Coll_21394.log 407165 Log file, useful mostly for debugging
Coll_21399.log 274496 Log file, useful mostly for debugging
Tune-2139-Plow_Boy-G-16-4.abc 596 ABC music file with the extracted tune(s)
Tune-2139-Plow_Boy-G-16-4.ps 35755 PostScript
Tune-2139-Plow_Boy-G-16-4.txt 596 Plain-text file with the extracted tune(s)
Tune-2139-get.log 5118 Log file, useful mostly for debugging
These files should be available for 24 hours.