Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/SliabhLuachroOnParade/Gow-CSR3-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4002-Gow-CSR3-abc1.ps) >>/Users/jc/w/tmp/Tune-4002-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/SliabhLuachroOnParade/Gow-CSR3-abc1.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-4002-Gow-CSR3-abc1.abc 167 ABC music file with the extracted tune(s)
Tune-4002-Gow-CSR3-abc1.ps 6 PostScript
Tune-4002-Gow-CSR3-abc1.txt 167 Plain-text file with the extracted tune(s)
Tune-4002-get.log 4229 Log file, useful mostly for debugging
Tune-40022-get.log 5506 Log file, useful mostly for debugging
Tune-40023-get.log 6711 Log file, useful mostly for debugging
Tune-40024-get.log 92343 Log file, useful mostly for debugging
Tune-40025-get.log 9421 Log file, useful mostly for debugging
Tune-40026-get.log 4119 Log file, useful mostly for debugging
Tune-40028-get.log 4483 Log file, useful mostly for debugging
Tune-40029-get.log 5118 Log file, useful mostly for debugging
These files should be available for 24 hours.