pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2136-WaysInNewHall0.ps) >>/Users/jc/w/tmp/Tune-2136-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/WaysInNewHall0.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_2136.log 238827 Log file, useful mostly for debugging
Coll_21362.log 575685 Log file, useful mostly for debugging
Coll_21364.log 281520 Log file, useful mostly for debugging
Coll_21366.log 715668 Log file, useful mostly for debugging
Tune-2136-WaysInNewHall0.abc 782 ABC music file with the extracted tune(s)
Tune-2136-WaysInNewHall0.ps 36539 PostScript
Tune-2136-WaysInNewHall0.txt 782 Plain-text file with the extracted tune(s)
Tune-2136-get.log 4879 Log file, useful mostly for debugging
These files should be available for 24 hours.