Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/12Minuets12Dances/FOEFDA.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1670-FOEFDA.ps) >>/Users/jc/w/tmp/Tune-1670-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/12Minuets12Dances/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
Tune-1670-FOEFDA.abc 156 ABC music file with the extracted tune(s)
Tune-1670-FOEFDA.ps 6 PostScript
Tune-1670-FOEFDA.txt 156 Plain-text file with the extracted tune(s)
Tune-1670-get.log 17325 Log file, useful mostly for debugging
Tune-16702-get.log 12224 Log file, useful mostly for debugging
Tune-16703-get.log 5774 Log file, useful mostly for debugging
Tune-16704-get.log 4294 Log file, useful mostly for debugging
Tune-16705-get.log 3602 Log file, useful mostly for debugging
Tune-16707-get.log 4329 Log file, useful mostly for debugging
These files should be available for 24 hours.