Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1813/newpage.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6544-newpage.ps) >>/Users/jc/w/tmp/Tune-6544-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1813/newpage.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_65447.log 1195 Log file, useful mostly for debugging
Form_65449.log 976 Log file, useful mostly for debugging
Tune-6544-get.log 3997 Log file, useful mostly for debugging
Tune-6544-newpage.abc 144 ABC music file with the extracted tune(s)
Tune-6544-newpage.ps 6 PostScript
Tune-6544-newpage.txt 144 Plain-text file with the extracted tune(s)
Tune-65441-get.log 1484 Log file, useful mostly for debugging
Tune-65443-get.log 4096 Log file, useful mostly for debugging
Tune-65448-get.log 1282 Log file, useful mostly for debugging
These files should be available for 24 hours.