Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1810/CTftF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4929-CTftF.ps) >>/Users/jc/w/tmp/Tune-4929-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1810/CTftF.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-4929-CTftF.abc 142 ABC music file with the extracted tune(s)
Tune-4929-CTftF.ps 6 PostScript
Tune-4929-CTftF.txt 142 Plain-text file with the extracted tune(s)
Tune-4929-get.log 8598 Log file, useful mostly for debugging
Tune-49292-get.log 5176 Log file, useful mostly for debugging
Tune-49293-get.log 5433 Log file, useful mostly for debugging
Tune-49294-get.log 4371 Log file, useful mostly for debugging
Tune-49295-get.log 4072 Log file, useful mostly for debugging
Tune-49296-get.log 4402 Log file, useful mostly for debugging
Tune-49297-get.log 4676 Log file, useful mostly for debugging
Tune-49298-get.log 5638 Log file, useful mostly for debugging
These files should be available for 24 hours.