Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1766/William_Clarke_MS_1770.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5640-William_Clarke_MS_1770.ps) >>/Users/jc/w/tmp/Tune-5640-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1766/William_Clarke_MS_1770.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-5640-William_Clarke_MS_1770.abc 159 ABC music file with the extracted tune(s)
Tune-5640-William_Clarke_MS_1770.ps 6 PostScript
Tune-5640-William_Clarke_MS_1770.txt 159 Plain-text file with the extracted tune(s)
Tune-5640-get.log 4312 Log file, useful mostly for debugging
Tune-56400-ERM-V1.abc 143 ABC music file with the extracted tune(s)
Tune-56400-ERM-V1.pdf 2217 Portable Data Format
Tune-56400-ERM-V1.ps 6 PostScript
Tune-56400-ERM-V1.txt 143 Plain-text file with the extracted tune(s)
Tune-56400-get.log 9763 Log file, useful mostly for debugging
Tune-56402-get.log 1364 Log file, useful mostly for debugging
Tune-56405-get.log 4012 Log file, useful mostly for debugging
Tune-56408-get.log 5886 Log file, useful mostly for debugging
These files should be available for 24 hours.