Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1796/JohnJohnson_ChoiceCollectionVol8-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4256-JohnJohnson_ChoiceCollectionVol8-V2.ps) >>/Users/jc/w/tmp/Tune-4256-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1796/JohnJohnson_ChoiceCollectionVol8-V2.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-4256-JohnJohnson_ChoiceCollectionVol8-V2.abc 172 ABC music file with the extracted tune(s)
Tune-4256-JohnJohnson_ChoiceCollectionVol8-V2.ps 6 PostScript
Tune-4256-JohnJohnson_ChoiceCollectionVol8-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-4256-get.log 8614 Log file, useful mostly for debugging
Tune-42560-get.log 10234 Log file, useful mostly for debugging
Tune-42561-get.log 12855 Log file, useful mostly for debugging
Tune-42562-get.log 4662 Log file, useful mostly for debugging
Tune-42564-get.log 9338 Log file, useful mostly for debugging
Tune-42567-get.log 9090 Log file, useful mostly for debugging
Tune-42568-get.log 3020 Log file, useful mostly for debugging
Tune-42569-get.log 5406 Log file, useful mostly for debugging
These files should be available for 24 hours.