pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7794-Captain_OKane-Em-16-3.ps) >>/Users/jc/w/tmp/Tune-7794-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/air/Captain_OKane-Em-16-3.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_77948.log 4357 Log file, useful mostly for debugging
Tune-7794-Captain_OKane-Em-16-3.abc 697 ABC music file with the extracted tune(s)
Tune-7794-Captain_OKane-Em-16-3.ps 38171 PostScript
Tune-7794-Captain_OKane-Em-16-3.txt 697 Plain-text file with the extracted tune(s)
Tune-7794-get.log 5415 Log file, useful mostly for debugging
Tune-77940-get.log 4058 Log file, useful mostly for debugging
Tune-77944-get.log 5111 Log file, useful mostly for debugging
Tune-77946-get.log 4846 Log file, useful mostly for debugging
These files should be available for 24 hours.