Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1796/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3078-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-3078-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1796/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
Coll_30782.log 157117 Log file, useful mostly for debugging
Tune-3078-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-3078-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-3078-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-3078-get.log 4593 Log file, useful mostly for debugging
Tune-30781-get.log 7906 Log file, useful mostly for debugging
Tune-30782-get.log 4737 Log file, useful mostly for debugging
Tune-30783-get.log 5871 Log file, useful mostly for debugging
Tune-30784-get.log 3919 Log file, useful mostly for debugging
Tune-30786-get.log 4103 Log file, useful mostly for debugging
Tune-30787-get.log 1388 Log file, useful mostly for debugging
Tune-30788-get.log 9653 Log file, useful mostly for debugging
These files should be available for 24 hours.