Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1780/William_Clarke_MS_1770.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2627-William_Clarke_MS_1770.ps) >>/Users/jc/w/tmp/Tune-2627-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1780/William_Clarke_MS_1770.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_26275.log 161667 Log file, useful mostly for debugging
Tune-2627-William_Clarke_MS_1770.abc 159 ABC music file with the extracted tune(s)
Tune-2627-William_Clarke_MS_1770.ps 6 PostScript
Tune-2627-William_Clarke_MS_1770.txt 159 Plain-text file with the extracted tune(s)
Tune-2627-get.log 21291 Log file, useful mostly for debugging
Tune-26270-get.log 9103 Log file, useful mostly for debugging
Tune-26271-get.log 3402 Log file, useful mostly for debugging
Tune-26273-get.log 8893 Log file, useful mostly for debugging
Tune-26275-get.log 24337 Log file, useful mostly for debugging
Tune-26276-get.log 8382 Log file, useful mostly for debugging
Tune-26278-get.log 8864 Log file, useful mostly for debugging
These files should be available for 24 hours.