Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1791/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7032-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-7032-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1791/JohnJohnson_ChoiceCollectionVol8-V1.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-7032-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-7032-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-7032-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-7032-get.log 4591 Log file, useful mostly for debugging
Tune-70320-get.log 1298 Log file, useful mostly for debugging
Tune-70324-get.log 2919 Log file, useful mostly for debugging
Tune-70326-1812_JGray.abc 17653 ABC music file with the extracted tune(s)
Tune-70326-1812_JGray.txt 17653 Plain-text file with the extracted tune(s)
Tune-70326-get.log 16599 Log file, useful mostly for debugging
Tune-70328-get.log 1490 Log file, useful mostly for debugging
These files should be available for 24 hours.