Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1791/JohnJohnson_ChoiceCollectionVol8-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2647-JohnJohnson_ChoiceCollectionVol8-V2.ps) >>/Users/jc/w/tmp/Tune-2647-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1791/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
Coll_26478.log 620811 Log file, useful mostly for debugging
Find_26476.log 1480 Log file, useful mostly for debugging
Form_26479.log 876 Log file, useful mostly for debugging
Tune-2647-JohnJohnson_ChoiceCollectionVol8-V2.abc 172 ABC music file with the extracted tune(s)
Tune-2647-JohnJohnson_ChoiceCollectionVol8-V2.ps 6 PostScript
Tune-2647-JohnJohnson_ChoiceCollectionVol8-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-2647-get.log 4593 Log file, useful mostly for debugging
Tune-26471-get.log 3522 Log file, useful mostly for debugging
Tune-26472-get.log 3174 Log file, useful mostly for debugging
Tune-26475-get.log 5322 Log file, useful mostly for debugging
Tune-26476-get.log 4193 Log file, useful mostly for debugging
Tune-26477-get.log 12138 Log file, useful mostly for debugging
Tune-26478-get.log 16090 Log file, useful mostly for debugging
Tune-26479-get.log 20192 Log file, useful mostly for debugging
These files should be available for 24 hours.