Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1750/24CountryDances_1770.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2452-24CountryDances_1770.ps) >>/Users/jc/w/tmp/Tune-2452-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1750/24CountryDances_1770.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_24522.log 996 Log file, useful mostly for debugging
Tune-2452-24CountryDances_1770.abc 157 ABC music file with the extracted tune(s)
Tune-2452-24CountryDances_1770.ps 6 PostScript
Tune-2452-24CountryDances_1770.txt 157 Plain-text file with the extracted tune(s)
Tune-2452-get.log 4274 Log file, useful mostly for debugging
Tune-24522-get.log 3440 Log file, useful mostly for debugging
Tune-24525-CR3-abc2.abc 157 ABC music file with the extracted tune(s)
Tune-24525-CR3-abc2.pdf 2217 Portable Data Format
Tune-24525-CR3-abc2.ps 6 PostScript
Tune-24525-CR3-abc2.txt 157 Plain-text file with the extracted tune(s)
Tune-24525-get.log 10694 Log file, useful mostly for debugging
These files should be available for 24 hours.