Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/dup/FARNE_Anonymous1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6891-FARNE_Anonymous1.ps) >>/Users/jc/w/tmp/Tune-6891-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/dup/FARNE_Anonymous1.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_68915.log 1311530 Log file, useful mostly for debugging
Tune-6891-FARNE_Anonymous1.abc 152 ABC music file with the extracted tune(s)
Tune-6891-FARNE_Anonymous1.ps 6 PostScript
Tune-6891-FARNE_Anonymous1.txt 152 Plain-text file with the extracted tune(s)
Tune-6891-get.log 4182 Log file, useful mostly for debugging
Tune-68910-get.log 4444 Log file, useful mostly for debugging
Tune-68911-get.log 1572 Log file, useful mostly for debugging
Tune-68915-get.log 3961 Log file, useful mostly for debugging
Tune-68916-get.log 3574 Log file, useful mostly for debugging
These files should be available for 24 hours.