Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1801/24CountryDances_1791_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1664-24CountryDances_1791_Thompson.ps) >>/Users/jc/w/tmp/Tune-1664-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1801/24CountryDances_1791_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_16642.log 283411 Log file, useful mostly for debugging
Tune-1664-24CountryDances_1791_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-1664-24CountryDances_1791_Thompson.ps 6 PostScript
Tune-1664-24CountryDances_1791_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-1664-get.log 4465 Log file, useful mostly for debugging
Tune-16640-20632_Dancing_Fiddler.abc 688 ABC music file with the extracted tune(s)
Tune-16640-20632_Dancing_Fiddler.ps 37319 PostScript
Tune-16640-20632_Dancing_Fiddler.txt 688 Plain-text file with the extracted tune(s)
Tune-16640-get.log 8149 Log file, useful mostly for debugging
Tune-16642-get.log 4001 Log file, useful mostly for debugging
Tune-16645-get.log 3168 Log file, useful mostly for debugging
These files should be available for 24 hours.