Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Sets/George_Meikle.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4727-George_Meikle.ps) >>/Users/jc/w/tmp/Tune-4727-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Sets/George_Meikle.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_47270.log 157116 Log file, useful mostly for debugging
Tune-4727-George_Meikle.abc 150 ABC music file with the extracted tune(s)
Tune-4727-George_Meikle.ps 6 PostScript
Tune-4727-George_Meikle.txt 150 Plain-text file with the extracted tune(s)
Tune-4727-get.log 9839 Log file, useful mostly for debugging
Tune-47270-get.log 5592 Log file, useful mostly for debugging
Tune-47274-get.log 4007 Log file, useful mostly for debugging
Tune-47276-get.log 4366 Log file, useful mostly for debugging
Tune-47277-IaST-abc1.abc 148 ABC music file with the extracted tune(s)
Tune-47277-IaST-abc1.txt 148 Plain-text file with the extracted tune(s)
Tune-47277-get.log 11791 Log file, useful mostly for debugging
Tune-47278-get.log 5638 Log file, useful mostly for debugging
Tune-47279-get.log 5493 Log file, useful mostly for debugging
These files should be available for 24 hours.