Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book18/24CountryDances_1805_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4435-24CountryDances_1805_Thompson.ps) >>/Users/jc/w/tmp/Tune-4435-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book18/24CountryDances_1805_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_4435.log 4581997 Log file, useful mostly for debugging
Tune-4435-24CountryDances_1805_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-4435-24CountryDances_1805_Thompson.ps 6 PostScript
Tune-4435-24CountryDances_1805_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-4435-get.log 4473 Log file, useful mostly for debugging
Tune-44350-get.log 11121 Log file, useful mostly for debugging
Tune-44350-slurs.abc 142 ABC music file with the extracted tune(s)
Tune-44350-slurs.ps 6 PostScript
Tune-44350-slurs.txt 142 Plain-text file with the extracted tune(s)
Tune-44351-get.log 5424 Log file, useful mostly for debugging
Tune-44352-get.log 3500 Log file, useful mostly for debugging
Tune-44353-get.log 4488 Log file, useful mostly for debugging
Tune-44355-get.log 6315 Log file, useful mostly for debugging
Tune-44356-get.log 3368 Log file, useful mostly for debugging
Tune-44358-dance.abc 142 ABC music file with the extracted tune(s)
Tune-44358-dance.pdf 2217 Portable Data Format
Tune-44358-dance.ps 6 PostScript
Tune-44358-dance.txt 142 Plain-text file with the extracted tune(s)
Tune-44358-get.log 14283 Log file, useful mostly for debugging
Tune-44359-get.log 3150 Log file, useful mostly for debugging
These files should be available for 24 hours.