Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/MM2/JohnJohnson_ChoiceCollectionVol8-VMP.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4920-JohnJohnson_ChoiceCollectionVol8-VMP.ps) >>/Users/jc/w/tmp/Tune-4920-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MM2/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
Tune-4920-DanielWright_CCCCD.abc 168 ABC music file with the extracted tune(s)
Tune-4920-DanielWright_CCCCD.ps 6 PostScript
Tune-4920-DanielWright_CCCCD.txt 168 Plain-text file with the extracted tune(s)
Tune-4920-JohnJohnson_ChoiceCollectionVol8-VMP.abc 172 ABC music file with the extracted tune(s)
Tune-4920-JohnJohnson_ChoiceCollectionVol8-VMP.ps 6 PostScript
Tune-4920-JohnJohnson_ChoiceCollectionVol8-VMP.txt 172 Plain-text file with the extracted tune(s)
Tune-4920-get.log 12455 Log file, useful mostly for debugging
Tune-49200-Hamilton_Kerr_MM2-V1.abc 173 ABC music file with the extracted tune(s)
Tune-49200-Hamilton_Kerr_MM2-V1.ps 6 PostScript
Tune-49200-Hamilton_Kerr_MM2-V1.txt 173 Plain-text file with the extracted tune(s)
Tune-49200-get.log 52975 Log file, useful mostly for debugging
Tune-49202-get.log 4332 Log file, useful mostly for debugging
Tune-49203-get.log 5429 Log file, useful mostly for debugging
Tune-49206-get.log 4088 Log file, useful mostly for debugging
These files should be available for 24 hours.