Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book04/BotCDaSS.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7606-BotCDaSS.ps) >>/Users/jc/w/tmp/Tune-7606-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book04/BotCDaSS.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-7606-BotCDaSS.abc 147 ABC music file with the extracted tune(s)
Tune-7606-BotCDaSS.ps 6 PostScript
Tune-7606-BotCDaSS.txt 147 Plain-text file with the extracted tune(s)
Tune-7606-get.log 4036 Log file, useful mostly for debugging
Tune-76061-get.log 15182 Log file, useful mostly for debugging
Tune-76062-get.log 4469 Log file, useful mostly for debugging
Tune-76064-get.log 5404 Log file, useful mostly for debugging
Tune-76067-get.log 4333 Log file, useful mostly for debugging
Tune-76068-get.log 5557 Log file, useful mostly for debugging
These files should be available for 24 hours.