pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78458-3023_the_Princess.ps) >>/Users/jc/w/tmp/Tune-78458-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Playford/AB/3023_the_Princess.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-78458-3023_the_Princess.abc 937 ABC music file with the extracted tune(s)
Tune-78458-3023_the_Princess.ps 38821 PostScript
Tune-78458-3023_the_Princess.txt 937 Plain-text file with the extracted tune(s)
Tune-78458-get.log 9018 Log file, useful mostly for debugging
These files should be available for 24 hours.