Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1800/sett.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6679-sett.ps) >>/Users/jc/w/tmp/Tune-6679-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1800/sett.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_66797.log 1710 Log file, useful mostly for debugging
Tune-6679-get.log 8812 Log file, useful mostly for debugging
Tune-6679-sett.abc 141 ABC music file with the extracted tune(s)
Tune-6679-sett.ps 6 PostScript
Tune-6679-sett.txt 141 Plain-text file with the extracted tune(s)
Tune-66794-get.log 4903 Log file, useful mostly for debugging
Tune-66796-10332_Mary_Gray.abc 530 ABC music file with the extracted tune(s)
Tune-66796-10332_Mary_Gray.pdf 13631 Portable Data Format
Tune-66796-10332_Mary_Gray.ps 35181 PostScript
Tune-66796-10332_Mary_Gray.txt 530 Plain-text file with the extracted tune(s)
Tune-66796-104_the_Nine-Pint_Coggie.abc 1059 ABC music file with the extracted tune(s)
Tune-66796-104_the_Nine-Pint_Coggie.ps 38431 PostScript
Tune-66796-104_the_Nine-Pint_Coggie.txt 1059 Plain-text file with the extracted tune(s)
Tune-66796-get.log 10305 Log file, useful mostly for debugging
These files should be available for 24 hours.