pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-45770-109203.ps) >>/Users/jc/w/tmp/Tune-45770-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM1/109203=Braes_Aboon_Bonaw-V2.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-45770-109203.abc 587 ABC music file with the extracted tune(s)
Tune-45770-109203.ps 34954 PostScript
Tune-45770-109203.txt 587 Plain-text file with the extracted tune(s)
Tune-45770-get.log 4720 Log file, useful mostly for debugging
These files should be available for 24 hours.