pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92618-20462_Logan_Water.ps) >>/Users/jc/w/tmp/Tune-92618-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ERM/20462_Logan_Water.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_92618.log 1118 Log file, useful mostly for debugging
Tune-92618-20462_Logan_Water.abc 619 ABC music file with the extracted tune(s)
Tune-92618-20462_Logan_Water.ps 36647 PostScript
Tune-92618-20462_Logan_Water.txt 619 Plain-text file with the extracted tune(s)
Tune-92618-get.log 6172 Log file, useful mostly for debugging
These files should be available for 24 hours.