Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1762/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2978-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-2978-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1762/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_2978.log 164267 Log file, useful mostly for debugging
Coll_29783.log 157767 Log file, useful mostly for debugging
Coll_29789.log 486411 Log file, useful mostly for debugging
Tune-2978-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-2978-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-2978-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-2978-get.log 11381 Log file, useful mostly for debugging
Tune-29781-get.log 4553 Log file, useful mostly for debugging
Tune-29782-get.log 5667 Log file, useful mostly for debugging
Tune-29783-get.log 14567 Log file, useful mostly for debugging
Tune-29785-JamesJohnson_ScotsMusicalMuseumV4-V1.abc 173 ABC music file with the extracted tune(s)
Tune-29785-JamesJohnson_ScotsMusicalMuseumV4-V1.txt 173 Plain-text file with the extracted tune(s)
Tune-29785-get.log 8393 Log file, useful mostly for debugging
Tune-29786-get.log 4383 Log file, useful mostly for debugging
Tune-29788-get.log 9179 Log file, useful mostly for debugging
These files should be available for 24 hours.