Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/4NCD/Gow-CSR3-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4701-Gow-CSR3-abc1.ps) >>/Users/jc/w/tmp/Tune-4701-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/4NCD/Gow-CSR3-abc1.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-4701-Gow-CSR3-abc1.abc 150 ABC music file with the extracted tune(s)
Tune-4701-Gow-CSR3-abc1.ps 6 PostScript
Tune-4701-Gow-CSR3-abc1.txt 150 Plain-text file with the extracted tune(s)
Tune-4701-get.log 8145 Log file, useful mostly for debugging
Tune-47010-get.log 5700 Log file, useful mostly for debugging
Tune-47011-get.log 5638 Log file, useful mostly for debugging
Tune-47012-get.log 4441 Log file, useful mostly for debugging
Tune-47013-get.log 4124 Log file, useful mostly for debugging
Tune-47014-get.log 3606 Log file, useful mostly for debugging
Tune-47015-get.log 11979 Log file, useful mostly for debugging
Tune-47017-get.log 9867 Log file, useful mostly for debugging
Tune-47018-get.log 8331 Log file, useful mostly for debugging
Tune-47019-get.log 3334 Log file, useful mostly for debugging
These files should be available for 24 hours.