pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78568-HectorTheHero.ps) >>/Users/jc/w/tmp/Tune-78568-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/HectorTheHero.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-78568-HectorTheHero.abc 3334 ABC music file with the extracted tune(s)
Tune-78568-HectorTheHero.ps 48985 PostScript
Tune-78568-HectorTheHero.txt 3334 Plain-text file with the extracted tune(s)
Tune-78568-Pols_Rattvik2.abc 1328 ABC music file with the extracted tune(s)
Tune-78568-Pols_Rattvik2.pdf 36901 Portable Data Format
Tune-78568-Pols_Rattvik2.ps 48607 PostScript
Tune-78568-Pols_Rattvik2.txt 1328 Plain-text file with the extracted tune(s)
Tune-78568-get.log 10713 Log file, useful mostly for debugging
These files should be available for 24 hours.