pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6951-Kitty_ONeill-Dm-16-2.ps) >>/Users/jc/w/tmp/Tune-6951-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/air/Kitty_ONeill-Dm-16-2.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_69515.log 904371 Log file, useful mostly for debugging
Tune-6951-Kitty_ONeill-Dm-16-2.abc 502 ABC music file with the extracted tune(s)
Tune-6951-Kitty_ONeill-Dm-16-2.ps 36197 PostScript
Tune-6951-Kitty_ONeill-Dm-16-2.txt 502 Plain-text file with the extracted tune(s)
Tune-6951-get.log 4681 Log file, useful mostly for debugging
Tune-69513-get.log 3838 Log file, useful mostly for debugging
Tune-69514-get.log 4702 Log file, useful mostly for debugging
Tune-69518-get.log 4008 Log file, useful mostly for debugging
These files should be available for 24 hours.