pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6660-1812_JGray.ps) >>/Users/jc/w/tmp/Tune-6660-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1812_JGray.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-6660-1812_JGray.abc 17653 ABC music file with the extracted tune(s)
Tune-6660-1812_JGray.ps 131716 PostScript
Tune-6660-1812_JGray.txt 17653 Plain-text file with the extracted tune(s)
Tune-6660-get.log 17920 Log file, useful mostly for debugging
Tune-66607-get.log 3672 Log file, useful mostly for debugging
These files should be available for 24 hours.