Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/B/12CountryDances_1796_Cahusac.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-25551-12CountryDances_1796_Cahusac.ps) >>/Users/jc/w/tmp/Tune-25551-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/B/12CountryDances_1796_Cahusac.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_25551.log 1118900 Log file, useful mostly for debugging
Tune-25551-12CountryDances_1796_Cahusac.abc 162 ABC music file with the extracted tune(s)
Tune-25551-12CountryDances_1796_Cahusac.ps 6 PostScript
Tune-25551-12CountryDances_1796_Cahusac.txt 162 Plain-text file with the extracted tune(s)
Tune-25551-get.log 4443 Log file, useful mostly for debugging
These files should be available for 24 hours.