pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-33539-DavyDavyNickNack_G16.ps) >>/Users/jc/w/tmp/Tune-33539-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/abc/Scotland/reel/DavyDavyNickNack_G16.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-33539-DavyDavyNickNack_G16.abc 467 ABC music file with the extracted tune(s)
Tune-33539-DavyDavyNickNack_G16.ps 33549 PostScript
Tune-33539-DavyDavyNickNack_G16.txt 467 Plain-text file with the extracted tune(s)
Tune-33539-get.log 4663 Log file, useful mostly for debugging
These files should be available for 24 hours.