Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1780/FARNE_Anonymous1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5160-FARNE_Anonymous1.ps) >>/Users/jc/w/tmp/Tune-5160-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1780/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_51603.log 140224 Log file, useful mostly for debugging
Tune-5160-FARNE_Anonymous1.abc 153 ABC music file with the extracted tune(s)
Tune-5160-FARNE_Anonymous1.ps 6 PostScript
Tune-5160-FARNE_Anonymous1.txt 153 Plain-text file with the extracted tune(s)
Tune-5160-get.log 4190 Log file, useful mostly for debugging
Tune-51601-Pat_Shaw_Pinewoods.abc 155 ABC music file with the extracted tune(s)
Tune-51601-Pat_Shaw_Pinewoods.txt 155 Plain-text file with the extracted tune(s)
Tune-51601-get.log 3332 Log file, useful mostly for debugging
Tune-51604-get.log 7888 Log file, useful mostly for debugging
Tune-51607-Gow-CSR1-abc1.abc 151 ABC music file with the extracted tune(s)
Tune-51607-Gow-CSR1-abc1.txt 151 Plain-text file with the extracted tune(s)
Tune-51607-get.log 7220 Log file, useful mostly for debugging
These files should be available for 24 hours.