Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1779/NorthumbrianMinstrelsy.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3839-NorthumbrianMinstrelsy.ps) >>/Users/jc/w/tmp/Tune-3839-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1779/NorthumbrianMinstrelsy.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-3839-NorthumbrianMinstrelsy.abc 159 ABC music file with the extracted tune(s)
Tune-3839-NorthumbrianMinstrelsy.ps 6 PostScript
Tune-3839-NorthumbrianMinstrelsy.txt 159 Plain-text file with the extracted tune(s)
Tune-3839-get.log 4318 Log file, useful mostly for debugging
Tune-38390-get.log 4658 Log file, useful mostly for debugging
Tune-38391-get.log 5547 Log file, useful mostly for debugging
Tune-38392-get.log 7857 Log file, useful mostly for debugging
Tune-38396-get.log 3160 Log file, useful mostly for debugging
Tune-38397-get.log 4824 Log file, useful mostly for debugging
Tune-38398-get.log 11409 Log file, useful mostly for debugging
Tune-38399-get.log 14641 Log file, useful mostly for debugging
These files should be available for 24 hours.