pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8758-CallerHerrin.ps) >>/Users/jc/w/tmp/Tune-8758-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/CallerHerrin.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_87582.log 646823 Log file, useful mostly for debugging
Tune-8758-CallerHerrin.abc 1119 ABC music file with the extracted tune(s)
Tune-8758-CallerHerrin.ps 38736 PostScript
Tune-8758-CallerHerrin.txt 1119 Plain-text file with the extracted tune(s)
Tune-8758-get.log 4831 Log file, useful mostly for debugging
These files should be available for 24 hours.