pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-89224-4271.ps) >>/Users/jc/w/tmp/Tune-89224-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR12/4271=Miss_Wedderburns_Reel-abc2.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-89224-4271.abc 1442 ABC music file with the extracted tune(s)
Tune-89224-4271.ps 47128 PostScript
Tune-89224-4271.txt 1442 Plain-text file with the extracted tune(s)
Tune-89224-get.log 5612 Log file, useful mostly for debugging
These files should be available for 24 hours.