pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88428-___.ps) >>/Users/jc/w/tmp/Tune-88428-get.log 2>&1" returned status 256
http://abcnotation.com/wiki/abc:standard:v2.2

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-88428-___.abc 1292 ABC music file with the extracted tune(s)
Tune-88428-___.ps 37096 PostScript
Tune-88428-___.txt 1292 Plain-text file with the extracted tune(s)
Tune-88428-get.log 8633 Log file, useful mostly for debugging
These files should be available for 24 hours.