Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/AdvancedSD/24CountryDances_1762_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4783-24CountryDances_1762_Thompson.ps) >>/Users/jc/w/tmp/Tune-4783-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AdvancedSD/24CountryDances_1762_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
Form_47832.log 879 Log file, useful mostly for debugging
Tune-4783-24CountryDances_1762_Thompson.abc 172 ABC music file with the extracted tune(s)
Tune-4783-24CountryDances_1762_Thompson.ps 6 PostScript
Tune-4783-24CountryDances_1762_Thompson.txt 172 Plain-text file with the extracted tune(s)
Tune-4783-get.log 4503 Log file, useful mostly for debugging
Tune-47830-get.log 9776 Log file, useful mostly for debugging
Tune-47833-get.log 4075 Log file, useful mostly for debugging
Tune-47834-get.log 7775 Log file, useful mostly for debugging
Tune-47835-Tune-68449-Feuillet_Essex_FtFIoD2.abc 185 ABC music file with the extracted tune(s)
Tune-47835-Tune-68449-Feuillet_Essex_FtFIoD2.ps 6 PostScript
Tune-47835-Tune-68449-Feuillet_Essex_FtFIoD2.txt 185 Plain-text file with the extracted tune(s)
Tune-47835-get.log 14128 Log file, useful mostly for debugging
Tune-47836-get.log 4103 Log file, useful mostly for debugging
Tune-47837-get.log 15247 Log file, useful mostly for debugging
Tune-47838-get.log 5654 Log file, useful mostly for debugging
These files should be available for 24 hours.