Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/T/Nelson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3110-Nelson.ps) >>/Users/jc/w/tmp/Tune-3110-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/T/Nelson.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-3110-Nelson.abc 140 ABC music file with the extracted tune(s)
Tune-3110-Nelson.ps 6 PostScript
Tune-3110-Nelson.txt 140 Plain-text file with the extracted tune(s)
Tune-3110-get.log 15496 Log file, useful mostly for debugging
Tune-31100-JamesJohnson_ScotsMusicalMuseumV4-V1.abc 173 ABC music file with the extracted tune(s)
Tune-31100-JamesJohnson_ScotsMusicalMuseumV4-V1.ps 6 PostScript
Tune-31100-JamesJohnson_ScotsMusicalMuseumV4-V1.txt 173 Plain-text file with the extracted tune(s)
Tune-31100-get.log 14864 Log file, useful mostly for debugging
Tune-31101-ERM-V1.abc 144 ABC music file with the extracted tune(s)
Tune-31101-ERM-V1.pdf 2217 Portable Data Format
Tune-31101-ERM-V1.ps 6 PostScript
Tune-31101-ERM-V1.txt 144 Plain-text file with the extracted tune(s)
Tune-31101-get.log 4774 Log file, useful mostly for debugging
Tune-31102-get.log 5303 Log file, useful mostly for debugging
Tune-31103-get.log 4003 Log file, useful mostly for debugging
Tune-31105-get.log 10366 Log file, useful mostly for debugging
Tune-31106-get.log 3884 Log file, useful mostly for debugging
Tune-31107-get.log 10232 Log file, useful mostly for debugging
Tune-31109-get.log 7975 Log file, useful mostly for debugging
These files should be available for 24 hours.