pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-83332-NigheanRuadh.ps) >>/Users/jc/w/tmp/Tune-83332-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/NigheanRuadh.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-83332-NigheanRuadh.abc 949 ABC music file with the extracted tune(s)
Tune-83332-NigheanRuadh.ps 36912 PostScript
Tune-83332-NigheanRuadh.txt 949 Plain-text file with the extracted tune(s)
Tune-83332-get.log 4860 Log file, useful mostly for debugging
These files should be available for 24 hours.