Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1778/JohnJohnson_ChoiceCollectionVol8-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2365-JohnJohnson_ChoiceCollectionVol8-V2.ps) >>/Users/jc/w/tmp/Tune-2365-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1778/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
Tune-2365-JohnJohnson_ChoiceCollectionVol8-V2.abc 172 ABC music file with the extracted tune(s)
Tune-2365-JohnJohnson_ChoiceCollectionVol8-V2.ps 6 PostScript
Tune-2365-JohnJohnson_ChoiceCollectionVol8-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-2365-get.log 9211 Log file, useful mostly for debugging
Tune-23650-Goulding_TwentyFourCountryDancesForTheYear1808.abc 185 ABC music file with the extracted tune(s)
Tune-23650-Goulding_TwentyFourCountryDancesForTheYear1808.pdf 2217 Portable Data Format
Tune-23650-Goulding_TwentyFourCountryDancesForTheYear1808.ps 6 PostScript
Tune-23650-Goulding_TwentyFourCountryDancesForTheYear1808.txt 185 Plain-text file with the extracted tune(s)
Tune-23650-get.log 10884 Log file, useful mostly for debugging
Tune-23652-get.log 10002 Log file, useful mostly for debugging
Tune-23653-get.log 9584 Log file, useful mostly for debugging
Tune-23657-get.log 14110 Log file, useful mostly for debugging
Tune-23659-get.log 3422 Log file, useful mostly for debugging
These files should be available for 24 hours.