pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8342-RestAndBeThankful.ps) >>/Users/jc/w/tmp/Tune-8342-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/RestAndBeThankful.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_83420.log 148666 Log file, useful mostly for debugging
Coll_83425.log 128616 Log file, useful mostly for debugging
Coll_83429.log 147319 Log file, useful mostly for debugging
Tune-8342-RestAndBeThankful.abc 1821 ABC music file with the extracted tune(s)
Tune-8342-RestAndBeThankful.ps 45305 PostScript
Tune-8342-RestAndBeThankful.txt 1821 Plain-text file with the extracted tune(s)
Tune-8342-get.log 5017 Log file, useful mostly for debugging
These files should be available for 24 hours.