Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book41/24CountryDances_1776_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4174-24CountryDances_1776_Thompson.ps) >>/Users/jc/w/tmp/Tune-4174-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book41/24CountryDances_1776_Thompson.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_41749.log 273611 Log file, useful mostly for debugging
Tune-4174-24CountryDances_1776_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-4174-24CountryDances_1776_Thompson.ps 6 PostScript
Tune-4174-24CountryDances_1776_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-4174-get.log 4473 Log file, useful mostly for debugging
Tune-41742-get.log 5408 Log file, useful mostly for debugging
Tune-41743-get.log 8537 Log file, useful mostly for debugging
Tune-41745-get.log 4083 Log file, useful mostly for debugging
Tune-41746-get.log 3510 Log file, useful mostly for debugging
Tune-41747-get.log 12936 Log file, useful mostly for debugging
Tune-41748-get.log 3232 Log file, useful mostly for debugging
Tune-41749-get.log 7874 Log file, useful mostly for debugging
These files should be available for 24 hours.