Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Sources.html/Gow-CSR4-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3632-Gow-CSR4-abc2.ps) >>/Users/jc/w/tmp/Tune-3632-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Sources.html/Gow-CSR4-abc2.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-3632-Gow-CSR4-abc2.abc 158 ABC music file with the extracted tune(s)
Tune-3632-Gow-CSR4-abc2.ps 6 PostScript
Tune-3632-Gow-CSR4-abc2.txt 158 Plain-text file with the extracted tune(s)
Tune-3632-get.log 4175 Log file, useful mostly for debugging
Tune-36323-get.log 12425 Log file, useful mostly for debugging
Tune-36325-get.log 1495 Log file, useful mostly for debugging
Tune-36326-get.log 1616 Log file, useful mostly for debugging
Tune-36327-get.log 9105 Log file, useful mostly for debugging
These files should be available for 24 hours.