Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1804/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3967-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-3967-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1804/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_39678.log 280612 Log file, useful mostly for debugging
Tune-3967-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-3967-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-3967-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-3967-get.log 17120 Log file, useful mostly for debugging
Tune-39671-get.log 4042 Log file, useful mostly for debugging
Tune-39673-get.log 8637 Log file, useful mostly for debugging
Tune-39674-get.log 12635 Log file, useful mostly for debugging
Tune-39675-get.log 16467 Log file, useful mostly for debugging
Tune-39676-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.abc 187 ABC music file with the extracted tune(s)
Tune-39676-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.ps 6 PostScript
Tune-39676-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_1.txt 187 Plain-text file with the extracted tune(s)
Tune-39676-get.log 13749 Log file, useful mostly for debugging
Tune-39677-get.log 4360 Log file, useful mostly for debugging
Tune-39678-get.log 5087 Log file, useful mostly for debugging
Tune-39679-get.log 18356 Log file, useful mostly for debugging
These files should be available for 24 hours.