Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1777/Playford_AB.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4921-Playford_AB.ps) >>/Users/jc/w/tmp/Tune-4921-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1777/Playford_AB.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_49215.log 916 Log file, useful mostly for debugging
Tune-4921-Playford_AB.abc 148 ABC music file with the extracted tune(s)
Tune-4921-Playford_AB.ps 6 PostScript
Tune-4921-Playford_AB.txt 148 Plain-text file with the extracted tune(s)
Tune-4921-get.log 4085 Log file, useful mostly for debugging
Tune-49213-LandLeagueJig.abc 460 ABC music file with the extracted tune(s)
Tune-49213-LandLeagueJig.ps 34192 PostScript
Tune-49213-LandLeagueJig.txt 460 Plain-text file with the extracted tune(s)
Tune-49213-get.log 10103 Log file, useful mostly for debugging
Tune-49214-Kerr_MM3-V1.abc 148 ABC music file with the extracted tune(s)
Tune-49214-Kerr_MM3-V1.txt 148 Plain-text file with the extracted tune(s)
Tune-49214-get.log 3202 Log file, useful mostly for debugging
Tune-49217-get.log 4925 Log file, useful mostly for debugging
Tune-49218-get.log 4431 Log file, useful mostly for debugging
These files should be available for 24 hours.