Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Sets/_.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4309-_.ps) >>/Users/jc/w/tmp/Tune-4309-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Sets/_.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_4309.log 1263 Log file, useful mostly for debugging
Tune-4309-_.abc 138 ABC music file with the extracted tune(s)
Tune-4309-_.ps 6 PostScript
Tune-4309-_.txt 138 Plain-text file with the extracted tune(s)
Tune-4309-get.log 3879 Log file, useful mostly for debugging
Tune-43090-get.log 9195 Log file, useful mostly for debugging
Tune-43096-get.log 5843 Log file, useful mostly for debugging
Tune-43098-get.log 10947 Log file, useful mostly for debugging
Tune-43099-get.log 4173 Log file, useful mostly for debugging
These files should be available for 24 hours.