pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-55840-DustyMiller0.ps) >>/Users/jc/w/tmp/Tune-55840-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/DustyMiller0.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_55840.log 1303341 Log file, useful mostly for debugging
Tune-55840-DustyMiller0.abc 769 ABC music file with the extracted tune(s)
Tune-55840-DustyMiller0.ps 36552 PostScript
Tune-55840-DustyMiller0.txt 769 Plain-text file with the extracted tune(s)
Tune-55840-get.log 4888 Log file, useful mostly for debugging
These files should be available for 24 hours.