pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57104-231_Waltz.ps) >>/Users/jc/w/tmp/Tune-57104-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/AbrahamMackintosh/231_Waltz.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-57104-231_Waltz.abc 1360 ABC music file with the extracted tune(s)
Tune-57104-231_Waltz.ps 44832 PostScript
Tune-57104-231_Waltz.txt 1360 Plain-text file with the extracted tune(s)
Tune-57104-get.log 4423 Log file, useful mostly for debugging
These files should be available for 24 hours.