pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-36815-Humphreys_Hornpipe-A-32-3.ps) >>/Users/jc/w/tmp/Tune-36815-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/hornpipe/Humphreys_Hornpipe-A-32-3.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-36815-Humphreys_Hornpipe-A-32-3.abc 524 ABC music file with the extracted tune(s)
Tune-36815-Humphreys_Hornpipe-A-32-3.ps 37002 PostScript
Tune-36815-Humphreys_Hornpipe-A-32-3.txt 524 Plain-text file with the extracted tune(s)
Tune-36815-get.log 13850 Log file, useful mostly for debugging
These files should be available for 24 hours.