Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1748/CTftF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4821-CTftF.ps) >>/Users/jc/w/tmp/Tune-4821-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1748/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-4821-CTftF.abc 142 ABC music file with the extracted tune(s)
Tune-4821-CTftF.ps 6 PostScript
Tune-4821-CTftF.txt 142 Plain-text file with the extracted tune(s)
Tune-4821-get.log 21053 Log file, useful mostly for debugging
Tune-48210-get.log 13225 Log file, useful mostly for debugging
Tune-48211-get.log 4241 Log file, useful mostly for debugging
Tune-48212-get.log 4855 Log file, useful mostly for debugging
Tune-48213-get.log 4509 Log file, useful mostly for debugging
Tune-48215-get.log 13094 Log file, useful mostly for debugging
Tune-48216-get.log 3130 Log file, useful mostly for debugging
Tune-48217-get.log 4038 Log file, useful mostly for debugging
Tune-48219-24CountryDances_1765_Thompson.abc 165 ABC music file with the extracted tune(s)
Tune-48219-24CountryDances_1765_Thompson.ps 6 PostScript
Tune-48219-24CountryDances_1765_Thompson.txt 165 Plain-text file with the extracted tune(s)
Tune-48219-get.log 4384 Log file, useful mostly for debugging
These files should be available for 24 hours.