pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5544-Mary_OSullivan-G-16-4.ps) >>/Users/jc/w/tmp/Tune-5544-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/march/Mary_OSullivan-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_55441.log 1281111 Log file, useful mostly for debugging
Tune-5544-Mary_OSullivan-G-16-4.abc 565 ABC music file with the extracted tune(s)
Tune-5544-Mary_OSullivan-G-16-4.ps 35012 PostScript
Tune-5544-Mary_OSullivan-G-16-4.txt 565 Plain-text file with the extracted tune(s)
Tune-5544-get.log 9573 Log file, useful mostly for debugging
Tune-55440-get.log 4975 Log file, useful mostly for debugging
Tune-55441-get.log 1396 Log file, useful mostly for debugging
Tune-55444-get.log 5704 Log file, useful mostly for debugging
Tune-55445-get.log 1396 Log file, useful mostly for debugging
Tune-55446-get.log 4019 Log file, useful mostly for debugging
Tune-55449-get.log 7059 Log file, useful mostly for debugging
These files should be available for 24 hours.