pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71736-PrinceOfWales2.ps) >>/Users/jc/w/tmp/Tune-71736-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/PrinceOfWales2.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-71736-PrinceOfWales2.abc 2520 ABC music file with the extracted tune(s)
Tune-71736-PrinceOfWales2.ps 57189 PostScript
Tune-71736-PrinceOfWales2.txt 2520 Plain-text file with the extracted tune(s)
Tune-71736-Vals22.abc 1174 ABC music file with the extracted tune(s)
Tune-71736-Vals22.ps 46006 PostScript
Tune-71736-Vals22.txt 1174 Plain-text file with the extracted tune(s)
Tune-71736-get.log 9206 Log file, useful mostly for debugging
These files should be available for 24 hours.