Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book21/24CountryDances_1796_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8800-24CountryDances_1796_Preston.ps) >>/Users/jc/w/tmp/Tune-8800-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book21/24CountryDances_1796_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_88000.log 668411 Log file, useful mostly for debugging
Coll_88009.log 380403 Log file, useful mostly for debugging
Tune-8800-24CountryDances_1796_Preston.abc 167 ABC music file with the extracted tune(s)
Tune-8800-24CountryDances_1796_Preston.ps 6 PostScript
Tune-8800-24CountryDances_1796_Preston.txt 167 Plain-text file with the extracted tune(s)
Tune-8800-get.log 18321 Log file, useful mostly for debugging
Tune-88000-get.log 9498 Log file, useful mostly for debugging
Tune-88002-get.log 4224 Log file, useful mostly for debugging
Tune-88003-get.log 4531 Log file, useful mostly for debugging
Tune-88004-get.log 9676 Log file, useful mostly for debugging
Tune-88007-get.log 8344 Log file, useful mostly for debugging
These files should be available for 24 hours.