pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-55515-___.ps) >>/Users/jc/w/tmp/Tune-55515-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/session/waltz/Waltz:Santa_Lucia.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-55515-___.abc 2922 ABC music file with the extracted tune(s)
Tune-55515-___.ps 46477 PostScript
Tune-55515-___.txt 2922 Plain-text file with the extracted tune(s)
Tune-55515-get.log 9606 Log file, useful mostly for debugging
These files should be available for 24 hours.