Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/EmpireCollection/NorthumbrianMinstrelsy.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6108-NorthumbrianMinstrelsy.ps) >>/Users/jc/w/tmp/Tune-6108-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EmpireCollection/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-6108-NorthumbrianMinstrelsy.abc 171 ABC music file with the extracted tune(s)
Tune-6108-NorthumbrianMinstrelsy.ps 6 PostScript
Tune-6108-NorthumbrianMinstrelsy.txt 171 Plain-text file with the extracted tune(s)
Tune-6108-get.log 9779 Log file, useful mostly for debugging
Tune-61080-get.log 3098 Log file, useful mostly for debugging
Tune-61081-get.log 3594 Log file, useful mostly for debugging
Tune-61083-get.log 4030 Log file, useful mostly for debugging
Tune-61084-get.log 15091 Log file, useful mostly for debugging
Tune-61085-get.log 12939 Log file, useful mostly for debugging
Tune-61087-get.log 11549 Log file, useful mostly for debugging
Tune-61089-get.log 4383 Log file, useful mostly for debugging
These files should be available for 24 hours.