Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/EDM/proto.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7366-proto.ps) >>/Users/jc/w/tmp/Tune-7366-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EDM/proto.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_73665.log 454211 Log file, useful mostly for debugging
Coll_73666.log 266611 Log file, useful mostly for debugging
Tune-7366-get.log 7287 Log file, useful mostly for debugging
Tune-7366-proto.abc 141 ABC music file with the extracted tune(s)
Tune-7366-proto.ps 6 PostScript
Tune-7366-proto.txt 141 Plain-text file with the extracted tune(s)
Tune-73661-get.log 1415 Log file, useful mostly for debugging
Tune-73662-get.log 4987 Log file, useful mostly for debugging
Tune-73663-24CountryDances_1802_Thompson.abc 167 ABC music file with the extracted tune(s)
Tune-73663-24CountryDances_1802_Thompson.txt 167 Plain-text file with the extracted tune(s)
Tune-73663-get.log 3556 Log file, useful mostly for debugging
Tune-73666-get.log 3982 Log file, useful mostly for debugging
These files should be available for 24 hours.