Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book09/Glen2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3460-Glen2.ps) >>/Users/jc/w/tmp/Tune-3460-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book09/Glen2.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_34600.log 861 Log file, useful mostly for debugging
Tune-3460-Glen2.abc 144 ABC music file with the extracted tune(s)
Tune-3460-Glen2.ps 6 PostScript
Tune-3460-Glen2.txt 144 Plain-text file with the extracted tune(s)
Tune-3460-get.log 3975 Log file, useful mostly for debugging
Tune-34600-get.log 65543 Log file, useful mostly for debugging
Tune-34601-get.log 6498 Log file, useful mostly for debugging
Tune-34602-get.log 3378 Log file, useful mostly for debugging
Tune-34603-get.log 27473 Log file, useful mostly for debugging
Tune-34609-get.log 4797 Log file, useful mostly for debugging
These files should be available for 24 hours.