Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Pioneer/_.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-40616-_.ps) >>/Users/jc/w/tmp/Tune-40616-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Pioneer/_.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-40616-441_Lailsons_Ride.abc 894 ABC music file with the extracted tune(s)
Tune-40616-441_Lailsons_Ride.ps 35273 PostScript
Tune-40616-441_Lailsons_Ride.txt 894 Plain-text file with the extracted tune(s)
Tune-40616-_.abc 141 ABC music file with the extracted tune(s)
Tune-40616-_.ps 6 PostScript
Tune-40616-_.txt 141 Plain-text file with the extracted tune(s)
Tune-40616-get.log 8648 Log file, useful mostly for debugging
These files should be available for 24 hours.