pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-13591-27_Allen_Water.ps) >>/Users/jc/w/tmp/Tune-13591-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Playford/COST/27_Allen_Water.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-13591-27_Allen_Water.abc 791 ABC music file with the extracted tune(s)
Tune-13591-27_Allen_Water.ps 35290 PostScript
Tune-13591-27_Allen_Water.txt 791 Plain-text file with the extracted tune(s)
Tune-13591-get.log 4520 Log file, useful mostly for debugging
These files should be available for 24 hours.