Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1813/JohnWalsh.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3659-JohnWalsh.ps) >>/Users/jc/w/tmp/Tune-3659-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1813/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
Coll_36594.log 151854 Log file, useful mostly for debugging
Tune-3659-EliasHowe_MusiciansCompanionP1-1842-V1.abc 175 ABC music file with the extracted tune(s)
Tune-3659-EliasHowe_MusiciansCompanionP1-1842-V1.txt 175 Plain-text file with the extracted tune(s)
Tune-3659-JohnWalsh.abc 146 ABC music file with the extracted tune(s)
Tune-3659-JohnWalsh.ps 6 PostScript
Tune-3659-JohnWalsh.txt 146 Plain-text file with the extracted tune(s)
Tune-3659-get.log 13317 Log file, useful mostly for debugging
Tune-36590-get.log 11162 Log file, useful mostly for debugging
Tune-36591-blank.abc 142 ABC music file with the extracted tune(s)
Tune-36591-blank.ps 6 PostScript
Tune-36591-blank.txt 142 Plain-text file with the extracted tune(s)
Tune-36591-get.log 4011 Log file, useful mostly for debugging
Tune-36594-get.log 4891 Log file, useful mostly for debugging
These files should be available for 24 hours.