pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15819-___.ps) >>/Users/jc/w/tmp/Tune-15819-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/session/waltz/Waltz:Anniversary-Gm,Am-64-4.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-15819-___.abc 1879 ABC music file with the extracted tune(s)
Tune-15819-___.ps 46983 PostScript
Tune-15819-___.txt 1879 Plain-text file with the extracted tune(s)
Tune-15819-get.log 4482 Log file, useful mostly for debugging
These files should be available for 24 hours.