Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1809/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3989-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-3989-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1809/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
Form_39896.log 808 Log file, useful mostly for debugging
Tune-3989-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-3989-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-3989-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-3989-get.log 4591 Log file, useful mostly for debugging
Tune-39890-12CountryDances_1796_Cahusac.abc 165 ABC music file with the extracted tune(s)
Tune-39890-12CountryDances_1796_Cahusac.pdf 2217 Portable Data Format
Tune-39890-12CountryDances_1796_Cahusac.ps 6 PostScript
Tune-39890-12CountryDances_1796_Cahusac.txt 165 Plain-text file with the extracted tune(s)
Tune-39890-get.log 5404 Log file, useful mostly for debugging
Tune-39898-24CountryDances_1771_Randall.abc 165 ABC music file with the extracted tune(s)
Tune-39898-24CountryDances_1771_Randall.ps 6 PostScript
Tune-39898-24CountryDances_1771_Randall.txt 165 Plain-text file with the extracted tune(s)
Tune-39898-get.log 4369 Log file, useful mostly for debugging
These files should be available for 24 hours.