pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-61110-231_Waltz.ps) >>/Users/jc/w/tmp/Tune-61110-get.log 2>&1" returned status 256
http://john-chambers.us/~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=0.55 512x512 PNG]
filesizedescription
Tune-61110-231_Waltz.abc 1360 ABC music file with the extracted tune(s)
Tune-61110-231_Waltz.ps 44956 PostScript
Tune-61110-231_Waltz.txt 1360 Plain-text file with the extracted tune(s)
Tune-61110-get.log 4419 Log file, useful mostly for debugging
These files should be available for 24 hours.