pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3458-TripToGretnaGreen.ps) >>/Users/jc/w/tmp/Tune-3458-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/TripToGretnaGreen.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_34582.log 285735 Log file, useful mostly for debugging
Find_34587.log 1829 Log file, useful mostly for debugging
Tune-3458-TripToGretnaGreen.abc 1950 ABC music file with the extracted tune(s)
Tune-3458-TripToGretnaGreen.ps 49320 PostScript
Tune-3458-TripToGretnaGreen.txt 1950 Plain-text file with the extracted tune(s)
Tune-3458-get.log 5017 Log file, useful mostly for debugging
These files should be available for 24 hours.