Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1751/JohnWalsh.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9357-JohnWalsh.ps) >>/Users/jc/w/tmp/Tune-9357-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1751/JohnWalsh.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-9357-JohnWalsh.abc 146 ABC music file with the extracted tune(s)
Tune-9357-JohnWalsh.ps 6 PostScript
Tune-9357-JohnWalsh.txt 146 Plain-text file with the extracted tune(s)
Tune-9357-get.log 4047 Log file, useful mostly for debugging
Tune-93572-get.log 4095 Log file, useful mostly for debugging
Tune-93574-get.log 8956 Log file, useful mostly for debugging
Tune-93575-24CountryDances_1772_Thompson.abc 174 ABC music file with the extracted tune(s)
Tune-93575-24CountryDances_1772_Thompson.ps 6 PostScript
Tune-93575-24CountryDances_1772_Thompson.txt 174 Plain-text file with the extracted tune(s)
Tune-93575-get.log 8467 Log file, useful mostly for debugging
Tune-93576-get.log 4971 Log file, useful mostly for debugging
Tune-93577-get.log 3258 Log file, useful mostly for debugging
Tune-93579-get.log 3530 Log file, useful mostly for debugging
These files should be available for 24 hours.