Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1760/24CountryDances_1799_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5473-24CountryDances_1799_Preston.ps) >>/Users/jc/w/tmp/Tune-5473-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1760/24CountryDances_1799_Preston.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_54733.log 1325571 Log file, useful mostly for debugging
Coll_54738.log 281520 Log file, useful mostly for debugging
Tune-5473-24CountryDances_1799_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-5473-24CountryDances_1799_Preston.ps 6 PostScript
Tune-5473-24CountryDances_1799_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-5473-get.log 4440 Log file, useful mostly for debugging
Tune-54734-get.log 1400 Log file, useful mostly for debugging
Tune-54738-get.log 1400 Log file, useful mostly for debugging
These files should be available for 24 hours.