Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/DftY/24CountryDances_1809_Cahusac_AK.abc/1809"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-10530-1809.ps) >>/Users/jc/w/tmp/Tune-10530-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/24CountryDances_1809_Cahusac_AK.abc/1809

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_10530.log 1008 Log file, useful mostly for debugging
Tune-10530-1809.abc 173 ABC music file with the extracted tune(s)
Tune-10530-1809.ps 6 PostScript
Tune-10530-1809.txt 173 Plain-text file with the extracted tune(s)
Tune-10530-get.log 4101 Log file, useful mostly for debugging
These files should be available for 24 hours.