Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1765/24CountryDances_1804_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4036-24CountryDances_1804_Preston.ps) >>/Users/jc/w/tmp/Tune-4036-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1765/24CountryDances_1804_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_40363.log 545664 Log file, useful mostly for debugging
Tune-4036-24CountryDances_1804_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-4036-24CountryDances_1804_Preston.ps 6 PostScript
Tune-4036-24CountryDances_1804_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-4036-BeggarBoyThe_PLFD1651_007-001.svg 10623 Scalable Vector Graphics format
Tune-4036-BeggarBoyThe_PLFD1651_007.abc 395 ABC music file with the extracted tune(s)
Tune-4036-BeggarBoyThe_PLFD1651_007.txt 395 Plain-text file with the extracted tune(s)
Tune-4036-get.log 8907 Log file, useful mostly for debugging
Tune-40360-get.log 6378 Log file, useful mostly for debugging
Tune-40364-QueensBirthdayThe_PLFD1703_514.abc 383 ABC music file with the extracted tune(s)
Tune-40364-QueensBirthdayThe_PLFD1703_514.pdf 15865 Portable Data Format
Tune-40364-QueensBirthdayThe_PLFD1703_514.ps 33588 PostScript
Tune-40364-QueensBirthdayThe_PLFD1703_514.txt 383 Plain-text file with the extracted tune(s)
Tune-40364-get.log 10540 Log file, useful mostly for debugging
Tune-40366-get.log 1388 Log file, useful mostly for debugging
These files should be available for 24 hours.