Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM4/24CountryDances_1818_Button_Whitaker.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4492-24CountryDances_1818_Button_Whitaker.ps) >>/Users/jc/w/tmp/Tune-4492-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM4/24CountryDances_1818_Button_Whitaker.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_44928.log 287612 Log file, useful mostly for debugging
Tune-4492-24CountryDances_1818_Button_Whitaker.abc 172 ABC music file with the extracted tune(s)
Tune-4492-24CountryDances_1818_Button_Whitaker.ps 6 PostScript
Tune-4492-24CountryDances_1818_Button_Whitaker.txt 172 Plain-text file with the extracted tune(s)
Tune-4492-get.log 4608 Log file, useful mostly for debugging
Tune-44923-get.log 1388 Log file, useful mostly for debugging
Tune-44928-24CountryDances_1776_Randall.abc 165 ABC music file with the extracted tune(s)
Tune-44928-24CountryDances_1776_Randall.txt 165 Plain-text file with the extracted tune(s)
Tune-44928-get.log 3510 Log file, useful mostly for debugging
These files should be available for 24 hours.