pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-72519-Anvil_A6.ps) >>/Users/jc/w/tmp/Tune-72519-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/Anvil_A6.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-72519-Anvil_A6.abc 778 ABC music file with the extracted tune(s)
Tune-72519-Anvil_A6.ps 38393 PostScript
Tune-72519-Anvil_A6.txt 778 Plain-text file with the extracted tune(s)
Tune-72519-get.log 4360 Log file, useful mostly for debugging
These files should be available for 24 hours.