Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Rare_Small/CTftF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2089-CTftF.ps) >>/Users/jc/w/tmp/Tune-2089-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Rare_Small/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
Coll_20897.log 289011 Log file, useful mostly for debugging
Tune-2089-CTftF.abc 148 ABC music file with the extracted tune(s)
Tune-2089-CTftF.ps 6 PostScript
Tune-2089-CTftF.txt 148 Plain-text file with the extracted tune(s)
Tune-2089-get.log 3997 Log file, useful mostly for debugging
Tune-20896-24CountryDances_1776_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-20896-24CountryDances_1776_Thompson.ps 6 PostScript
Tune-20896-24CountryDances_1776_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-20896-get.log 4515 Log file, useful mostly for debugging
Tune-20898-get.log 3670 Log file, useful mostly for debugging
These files should be available for 24 hours.