pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2047-HillsOfLorne.ps) >>/Users/jc/w/tmp/Tune-2047-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/HillsOfLorne.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_20470.log 284330 Log file, useful mostly for debugging
Coll_20474.log 693189 Log file, useful mostly for debugging
Coll_20475.log 690378 Log file, useful mostly for debugging
Coll_20476.log 282926 Log file, useful mostly for debugging
Tune-2047-HillsOfLorne.abc 2013 ABC music file with the extracted tune(s)
Tune-2047-HillsOfLorne.ps 44848 PostScript
Tune-2047-HillsOfLorne.txt 2013 Plain-text file with the extracted tune(s)
Tune-2047-get.log 4421 Log file, useful mostly for debugging
These files should be available for 24 hours.