Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book20/24CountryDances_1800_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7644-24CountryDances_1800_Preston.ps) >>/Users/jc/w/tmp/Tune-7644-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book20/24CountryDances_1800_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_76446.log 636211 Log file, useful mostly for debugging
Tune-7644-24CountryDances_1800_Preston.abc 167 ABC music file with the extracted tune(s)
Tune-7644-24CountryDances_1800_Preston.ps 6 PostScript
Tune-7644-24CountryDances_1800_Preston.txt 167 Plain-text file with the extracted tune(s)
Tune-7644-get.log 4450 Log file, useful mostly for debugging
Tune-76440-get.log 8304 Log file, useful mostly for debugging
Tune-76441-get.log 5548 Log file, useful mostly for debugging
Tune-76443-get.log 9152 Log file, useful mostly for debugging
Tune-76444-get.log 3720 Log file, useful mostly for debugging
Tune-76445-get.log 4545 Log file, useful mostly for debugging
These files should be available for 24 hours.