Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Pioneer/MoF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4747-MoF.ps) >>/Users/jc/w/tmp/Tune-4747-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Pioneer/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_47476.log 315240 Log file, useful mostly for debugging
Coll_47479.log 271688 Log file, useful mostly for debugging
Form_47472.log 815 Log file, useful mostly for debugging
Tune-4747-MoF.abc 143 ABC music file with the extracted tune(s)
Tune-4747-MoF.ps 6 PostScript
Tune-4747-MoF.txt 143 Plain-text file with the extracted tune(s)
Tune-4747-get.log 3939 Log file, useful mostly for debugging
Tune-47473-get.log 4289 Log file, useful mostly for debugging
Tune-47478-get.log 5232 Log file, useful mostly for debugging
These files should be available for 24 hours.