pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28931-129_.ps) >>/Users/jc/w/tmp/Tune-28931-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EverydaySongBook/129_.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-28931-129_.abc 48 ABC music file with the extracted tune(s)
Tune-28931-129_.ps 30921 PostScript
Tune-28931-129_.txt 48 Plain-text file with the extracted tune(s)
Tune-28931-get.log 3840 Log file, useful mostly for debugging
These files should be available for 24 hours.