pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99904-OCarolans_Lament-Dm-16-2.ps) >>/Users/jc/w/tmp/Tune-99904-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/air/OCarolans_Lament-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_99904.log 132379 Log file, useful mostly for debugging
Tune-99904-OCarolans_Lament-Dm-16-2.abc 514 ABC music file with the extracted tune(s)
Tune-99904-OCarolans_Lament-Dm-16-2.ps 35491 PostScript
Tune-99904-OCarolans_Lament-Dm-16-2.txt 514 Plain-text file with the extracted tune(s)
Tune-99904-get.log 4826 Log file, useful mostly for debugging
These files should be available for 24 hours.