Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/_/Pioneer.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6308-Pioneer.ps) >>/Users/jc/w/tmp/Tune-6308-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/_/Pioneer.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_63089.log 277305 Log file, useful mostly for debugging
Tune-6308-Pioneer.abc 141 ABC music file with the extracted tune(s)
Tune-6308-Pioneer.ps 6 PostScript
Tune-6308-Pioneer.txt 141 Plain-text file with the extracted tune(s)
Tune-6308-get.log 3983 Log file, useful mostly for debugging
Tune-63086-get.log 3530 Log file, useful mostly for debugging
Tune-63087-get.log 3846 Log file, useful mostly for debugging
These files should be available for 24 hours.