Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1748/William_Clarke_MS_1770.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4985-William_Clarke_MS_1770.ps) >>/Users/jc/w/tmp/Tune-4985-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1748/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_4985.log 412212 Log file, useful mostly for debugging
Tune-4985-William_Clarke_MS_1770.abc 159 ABC music file with the extracted tune(s)
Tune-4985-William_Clarke_MS_1770.ps 6 PostScript
Tune-4985-William_Clarke_MS_1770.txt 159 Plain-text file with the extracted tune(s)
Tune-4985-get.log 19331 Log file, useful mostly for debugging
Tune-49850-get.log 4494 Log file, useful mostly for debugging
Tune-49852-get.log 3440 Log file, useful mostly for debugging
Tune-49854-get.log 6502 Log file, useful mostly for debugging
Tune-49855-get.log 4526 Log file, useful mostly for debugging
Tune-49859-get.log 13198 Log file, useful mostly for debugging
These files should be available for 24 hours.