Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1778/Kohlers.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9573-Kohlers.ps) >>/Users/jc/w/tmp/Tune-9573-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1778/Kohlers.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_95732.log 1357 Log file, useful mostly for debugging
Tune-9573-Kohlers.abc 144 ABC music file with the extracted tune(s)
Tune-9573-Kohlers.ps 6 PostScript
Tune-9573-Kohlers.txt 144 Plain-text file with the extracted tune(s)
Tune-9573-get.log 4005 Log file, useful mostly for debugging
Tune-95731-24CountryDances_1793_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-95731-24CountryDances_1793_Preston.ps 6 PostScript
Tune-95731-24CountryDances_1793_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-95731-get.log 4492 Log file, useful mostly for debugging
Tune-95732-get.log 1337 Log file, useful mostly for debugging
Tune-95736-JohnJohnson_ChoiceCollectionVol8-VMP.abc 173 ABC music file with the extracted tune(s)
Tune-95736-JohnJohnson_ChoiceCollectionVol8-VMP.txt 173 Plain-text file with the extracted tune(s)
Tune-95736-get.log 4956 Log file, useful mostly for debugging
These files should be available for 24 hours.