Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book18/24CountryDances_1782_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3768-24CountryDances_1782_Thompson.ps) >>/Users/jc/w/tmp/Tune-3768-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book18/24CountryDances_1782_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
Tune-3768-24CountryDances_1782_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-3768-24CountryDances_1782_Thompson.ps 6 PostScript
Tune-3768-24CountryDances_1782_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-3768-get.log 4473 Log file, useful mostly for debugging
Tune-37680-get.log 3654 Log file, useful mostly for debugging
Tune-37682-get.log 4338 Log file, useful mostly for debugging
Tune-37683-get.log 5830 Log file, useful mostly for debugging
Tune-37684-get.log 13166 Log file, useful mostly for debugging
Tune-37685-get.log 7252 Log file, useful mostly for debugging
Tune-37686-get.log 3198 Log file, useful mostly for debugging
Tune-37688-get.log 8474 Log file, useful mostly for debugging
These files should be available for 24 hours.