Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1784/FOEFDA.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7815-FOEFDA.ps) >>/Users/jc/w/tmp/Tune-7815-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1784/FOEFDA.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_7815.log 391110 Log file, useful mostly for debugging
Coll_78152.log 694590 Log file, useful mostly for debugging
Coll_78153.log 346150 Log file, useful mostly for debugging
Coll_78158.log 305407 Log file, useful mostly for debugging
Tune-7815-FOEFDA.abc 143 ABC music file with the extracted tune(s)
Tune-7815-FOEFDA.ps 6 PostScript
Tune-7815-FOEFDA.txt 143 Plain-text file with the extracted tune(s)
Tune-7815-get.log 3980 Log file, useful mostly for debugging
Tune-78150-get.log 4278 Log file, useful mostly for debugging
Tune-78151-get.log 5508 Log file, useful mostly for debugging
Tune-78152-get.log 4291 Log file, useful mostly for debugging
Tune-78154-get.log 6059 Log file, useful mostly for debugging
Tune-78157-get.log 6612 Log file, useful mostly for debugging
Tune-78158-get.log 5209 Log file, useful mostly for debugging
These files should be available for 24 hours.