Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/hambo/24CountryDances_1774_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7279-24CountryDances_1774_Thompson.ps) >>/Users/jc/w/tmp/Tune-7279-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/hambo/24CountryDances_1774_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_72791.log 171417 Log file, useful mostly for debugging
Tune-7279-24CountryDances_1774_Thompson.abc 167 ABC music file with the extracted tune(s)
Tune-7279-24CountryDances_1774_Thompson.ps 6 PostScript
Tune-7279-24CountryDances_1774_Thompson.txt 167 Plain-text file with the extracted tune(s)
Tune-7279-get.log 4465 Log file, useful mostly for debugging
Tune-72790-24CountryDances_1805_Preston.abc 166 ABC music file with the extracted tune(s)
Tune-72790-24CountryDances_1805_Preston.ps 6 PostScript
Tune-72790-24CountryDances_1805_Preston.txt 166 Plain-text file with the extracted tune(s)
Tune-72790-get.log 7062 Log file, useful mostly for debugging
Tune-72791-get.log 8829 Log file, useful mostly for debugging
Tune-72795-get.log 5708 Log file, useful mostly for debugging
Tune-72797-get.log 5484 Log file, useful mostly for debugging
Tune-72798-get.log 18666 Log file, useful mostly for debugging
Tune-72799-get.log 4234 Log file, useful mostly for debugging
These files should be available for 24 hours.