Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/was/JohnFrench.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8666-JohnFrench.ps) >>/Users/jc/w/tmp/Tune-8666-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/was/JohnFrench.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-8666-JohnFrench.abc 146 ABC music file with the extracted tune(s)
Tune-8666-JohnFrench.ps 6 PostScript
Tune-8666-JohnFrench.txt 146 Plain-text file with the extracted tune(s)
Tune-8666-get.log 4060 Log file, useful mostly for debugging
Tune-86662-get.log 4822 Log file, useful mostly for debugging
Tune-86663-get.log 3562 Log file, useful mostly for debugging
Tune-86664-JamesJohnson_ScotsMusicalMuseumV4-V1.abc 186 ABC music file with the extracted tune(s)
Tune-86664-JamesJohnson_ScotsMusicalMuseumV4-V1.txt 186 Plain-text file with the extracted tune(s)
Tune-86664-get.log 3732 Log file, useful mostly for debugging
Tune-86665-ThomasMarsden.abc 150 ABC music file with the extracted tune(s)
Tune-86665-ThomasMarsden.ps 6 PostScript
Tune-86665-ThomasMarsden.txt 150 Plain-text file with the extracted tune(s)
Tune-86665-get.log 4056 Log file, useful mostly for debugging
These files should be available for 24 hours.