pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-83836-RoseOfNorth.ps) >>/Users/jc/w/tmp/Tune-83836-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/RoseOfNorth.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-83836-RoseOfNorth.abc 1821 ABC music file with the extracted tune(s)
Tune-83836-RoseOfNorth.ps 53906 PostScript
Tune-83836-RoseOfNorth.txt 1821 Plain-text file with the extracted tune(s)
Tune-83836-get.log 4859 Log file, useful mostly for debugging
These files should be available for 24 hours.