Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/tunes/24CountryDances_1798_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2999-24CountryDances_1798_Preston.ps) >>/Users/jc/w/tmp/Tune-2999-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/tunes/24CountryDances_1798_Preston.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_29996.log 1206231 Log file, useful mostly for debugging
Tune-2999-24CountryDances_1798_Preston.abc 166 ABC music file with the extracted tune(s)
Tune-2999-24CountryDances_1798_Preston.ps 6 PostScript
Tune-2999-24CountryDances_1798_Preston.txt 166 Plain-text file with the extracted tune(s)
Tune-2999-get.log 14607 Log file, useful mostly for debugging
Tune-29991-24CountryDances_1798_Bland_Weller.abc 173 ABC music file with the extracted tune(s)
Tune-29991-24CountryDances_1798_Bland_Weller.pdf 2217 Portable Data Format
Tune-29991-24CountryDances_1798_Bland_Weller.ps 6 PostScript
Tune-29991-24CountryDances_1798_Bland_Weller.txt 173 Plain-text file with the extracted tune(s)
Tune-29991-get.log 5567 Log file, useful mostly for debugging
Tune-29994-get.log 5770 Log file, useful mostly for debugging
Tune-29995-get.log 1306 Log file, useful mostly for debugging
Tune-29998-get.log 5620 Log file, useful mostly for debugging
These files should be available for 24 hours.