Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1785/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6136-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-6136-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1785/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-6136-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-6136-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-6136-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-6136-get.log 4589 Log file, useful mostly for debugging
Tune-61360-get.log 3214 Log file, useful mostly for debugging
Tune-61361-get.log 3983 Log file, useful mostly for debugging
Tune-61363-get.log 9242 Log file, useful mostly for debugging
Tune-61366-get.log 6167 Log file, useful mostly for debugging
Tune-61368-get.log 3618 Log file, useful mostly for debugging
Tune-61369-get.log 8742 Log file, useful mostly for debugging
These files should be available for 24 hours.