Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/abc2/Playford_AB.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6463-Playford_AB.ps) >>/Users/jc/w/tmp/Tune-6463-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/abc2/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
Coll_64634.log 908940 Log file, useful mostly for debugging
Form_64631.log 966 Log file, useful mostly for debugging
Tune-6463-Playford_AB.abc 148 ABC music file with the extracted tune(s)
Tune-6463-Playford_AB.ps 6 PostScript
Tune-6463-Playford_AB.txt 148 Plain-text file with the extracted tune(s)
Tune-6463-get.log 13935 Log file, useful mostly for debugging
Tune-64630-get.log 4137 Log file, useful mostly for debugging
Tune-64631-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-64631-CaledonianCountryDances.ps 6 PostScript
Tune-64631-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-64631-get.log 4260 Log file, useful mostly for debugging
Tune-64637-get.log 4925 Log file, useful mostly for debugging
These files should be available for 24 hours.