Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/MCCD/blank.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4181-blank.ps) >>/Users/jc/w/tmp/Tune-4181-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MCCD/blank.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-4181-blank.abc 142 ABC music file with the extracted tune(s)
Tune-4181-blank.ps 6 PostScript
Tune-4181-blank.txt 142 Plain-text file with the extracted tune(s)
Tune-4181-get.log 9166 Log file, useful mostly for debugging
Tune-41810-get.log 2960 Log file, useful mostly for debugging
Tune-41811-get.log 2976 Log file, useful mostly for debugging
Tune-41812-get.log 3564 Log file, useful mostly for debugging
Tune-41813-get.log 3372 Log file, useful mostly for debugging
Tune-41814-get.log 9961 Log file, useful mostly for debugging
Tune-41815-get.log 16091 Log file, useful mostly for debugging
Tune-41818-get.log 2844 Log file, useful mostly for debugging
These files should be available for 24 hours.