Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1753/MoF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5511-MoF.ps) >>/Users/jc/w/tmp/Tune-5511-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1753/MoF.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_55113.log 1275260 Log file, useful mostly for debugging
Tune-5511-MoF.abc 140 ABC music file with the extracted tune(s)
Tune-5511-MoF.ps 6 PostScript
Tune-5511-MoF.txt 140 Plain-text file with the extracted tune(s)
Tune-5511-get.log 3919 Log file, useful mostly for debugging
Tune-55111-Garryowen_with_variations_.abc 165 ABC music file with the extracted tune(s)
Tune-55111-Garryowen_with_variations_.ps 6 PostScript
Tune-55111-Garryowen_with_variations_.txt 165 Plain-text file with the extracted tune(s)
Tune-55111-get.log 4460 Log file, useful mostly for debugging
Tune-55116-get.log 1462 Log file, useful mostly for debugging
Tune-55119-get.log 5219 Log file, useful mostly for debugging
These files should be available for 24 hours.