Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book18/24CountryDances_1802_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8273-24CountryDances_1802_Thompson.ps) >>/Users/jc/w/tmp/Tune-8273-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book18/24CountryDances_1802_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_82731.log 483612 Log file, useful mostly for debugging
Tune-8273-24CountryDances_1802_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-8273-24CountryDances_1802_Thompson.ps 6 PostScript
Tune-8273-24CountryDances_1802_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-8273-get.log 14936 Log file, useful mostly for debugging
Tune-82730-get.log 4386 Log file, useful mostly for debugging
Tune-82733-get.log 4444 Log file, useful mostly for debugging
Tune-82734-get.log 5987 Log file, useful mostly for debugging
Tune-82735-get.log 9557 Log file, useful mostly for debugging
Tune-82736-get.log 4616 Log file, useful mostly for debugging
Tune-82739-24CountryDances_1805_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-82739-24CountryDances_1805_Thompson.ps 6 PostScript
Tune-82739-24CountryDances_1805_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-82739-get.log 8014 Log file, useful mostly for debugging
These files should be available for 24 hours.