Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Glen2/24CountryDances_1776_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9899-24CountryDances_1776_Thompson.ps) >>/Users/jc/w/tmp/Tune-9899-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Glen2/24CountryDances_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_98993.log 1339611 Log file, useful mostly for debugging
Coll_98996.log 289950 Log file, useful mostly for debugging
Coll_98998.log 287140 Log file, useful mostly for debugging
Coll_98999.log 582711 Log file, useful mostly for debugging
Tune-9899-24CountryDances_1776_Thompson.abc 167 ABC music file with the extracted tune(s)
Tune-9899-24CountryDances_1776_Thompson.ps 6 PostScript
Tune-9899-24CountryDances_1776_Thompson.txt 167 Plain-text file with the extracted tune(s)
Tune-9899-get.log 4471 Log file, useful mostly for debugging
Tune-98994-get.log 4942 Log file, useful mostly for debugging
Tune-98999-get.log 4038 Log file, useful mostly for debugging
These files should be available for 24 hours.