pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91775-RuffiansRant.ps) >>/Users/jc/w/tmp/Tune-91775-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/RuffiansRant.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-91775-RuffiansRant.abc 2361 ABC music file with the extracted tune(s)
Tune-91775-RuffiansRant.ps 62091 PostScript
Tune-91775-RuffiansRant.txt 2361 Plain-text file with the extracted tune(s)
Tune-91775-get.log 6299 Log file, useful mostly for debugging
These files should be available for 24 hours.