pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-18813-CatInTheWindow.ps) >>/Users/jc/w/tmp/Tune-18813-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/England/CatInTheWindow.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-18813-CatInTheWindow.abc 966 ABC music file with the extracted tune(s)
Tune-18813-CatInTheWindow.ps 38168 PostScript
Tune-18813-CatInTheWindow.txt 966 Plain-text file with the extracted tune(s)
Tune-18813-get.log 4444 Log file, useful mostly for debugging
These files should be available for 24 hours.