Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1794/24CountryDances_1780_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6606-24CountryDances_1780_Thompson.ps) >>/Users/jc/w/tmp/Tune-6606-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1794/24CountryDances_1780_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-6606-12CountryDances_1796_Cahusac.abc 165 ABC music file with the extracted tune(s)
Tune-6606-12CountryDances_1796_Cahusac.txt 165 Plain-text file with the extracted tune(s)
Tune-6606-24CountryDances_1780_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-6606-24CountryDances_1780_Thompson.ps 6 PostScript
Tune-6606-24CountryDances_1780_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-6606-get.log 12661 Log file, useful mostly for debugging
Tune-66063-get.log 3652 Log file, useful mostly for debugging
Tune-66064-HillCountryTunes.abc 153 ABC music file with the extracted tune(s)
Tune-66064-HillCountryTunes.ps 6 PostScript
Tune-66064-HillCountryTunes.txt 153 Plain-text file with the extracted tune(s)
Tune-66064-get.log 5513 Log file, useful mostly for debugging
Tune-66065-get.log 3080 Log file, useful mostly for debugging
Tune-66067-get.log 4366 Log file, useful mostly for debugging
These files should be available for 24 hours.