Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book22/JohnJohnson_ChoiceCollectionVol8-VMP.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1781-JohnJohnson_ChoiceCollectionVol8-VMP.ps) >>/Users/jc/w/tmp/Tune-1781-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book22/JohnJohnson_ChoiceCollectionVol8-VMP.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_17815.log 626411 Log file, useful mostly for debugging
Tune-1781-JohnJohnson_ChoiceCollectionVol8-VMP.abc 175 ABC music file with the extracted tune(s)
Tune-1781-JohnJohnson_ChoiceCollectionVol8-VMP.ps 6 PostScript
Tune-1781-JohnJohnson_ChoiceCollectionVol8-VMP.txt 175 Plain-text file with the extracted tune(s)
Tune-1781-get.log 10273 Log file, useful mostly for debugging
Tune-17810-get.log 8690 Log file, useful mostly for debugging
Tune-17812-get.log 5577 Log file, useful mostly for debugging
Tune-17814-get.log 9982 Log file, useful mostly for debugging
Tune-17816-get.log 11292 Log file, useful mostly for debugging
Tune-17818-get.log 3356 Log file, useful mostly for debugging
Tune-17819-get.log 3416 Log file, useful mostly for debugging
Tune-78148-24CountryDances_1781_Skillern.abc 172 ABC music file with the extracted tune(s)
Tune-78148-24CountryDances_1781_Skillern.ps 6 PostScript
Tune-78148-24CountryDances_1781_Skillern.txt 172 Plain-text file with the extracted tune(s)
Tune-80899-24CountryDances_1781_Skillern.abc 172 ABC music file with the extracted tune(s)
Tune-80899-24CountryDances_1781_Skillern.txt 172 Plain-text file with the extracted tune(s)
Tune-84787-24CountryDances_1781_Skillern.abc 173 ABC music file with the extracted tune(s)
Tune-84787-24CountryDances_1781_Skillern.ps 6 PostScript
Tune-84787-24CountryDances_1781_Skillern.txt 173 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.