Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/gavving-bin/CDfNH1783.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8963-CDfNH1783.ps) >>/Users/jc/w/tmp/Tune-8963-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/gavving-bin/CDfNH1783.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_89631.log 915 Log file, useful mostly for debugging
Tune-8963-CDfNH1783.abc 153 ABC music file with the extracted tune(s)
Tune-8963-CDfNH1783.ps 6 PostScript
Tune-8963-CDfNH1783.txt 153 Plain-text file with the extracted tune(s)
Tune-8963-get.log 4085 Log file, useful mostly for debugging
Tune-89630-get.log 5358 Log file, useful mostly for debugging
Tune-89631-get.log 5605 Log file, useful mostly for debugging
Tune-89634-get.log 5856 Log file, useful mostly for debugging
Tune-89635-get.log 9671 Log file, useful mostly for debugging
Tune-89636-get.log 4273 Log file, useful mostly for debugging
Tune-89637-get.log 8042 Log file, useful mostly for debugging
These files should be available for 24 hours.