pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-80380-4141_Black_Mary.ps) >>/Users/jc/w/tmp/Tune-80380-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CSR/4141_Black_Mary.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-80380-4141_Black_Mary.abc 1121 ABC music file with the extracted tune(s)
Tune-80380-4141_Black_Mary.ps 39779 PostScript
Tune-80380-4141_Black_Mary.txt 1121 Plain-text file with the extracted tune(s)
Tune-80380-get.log 4491 Log file, useful mostly for debugging
These files should be available for 24 hours.