pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-27504-MacArthur_Road.ps) >>/Users/jc/w/tmp/Tune-27504-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MacArthur_Road.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-27504-MacArthur_Road.abc 1865 ABC music file with the extracted tune(s)
Tune-27504-MacArthur_Road.ps 52978 PostScript
Tune-27504-MacArthur_Road.txt 1865 Plain-text file with the extracted tune(s)
Tune-27504-get.log 5473 Log file, useful mostly for debugging
These files should be available for 24 hours.