Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1774/OriginallyMine.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8535-OriginallyMine.ps) >>/Users/jc/w/tmp/Tune-8535-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1774/OriginallyMine.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_85356.log 671212 Log file, useful mostly for debugging
Find_85352.log 2842 Log file, useful mostly for debugging
Tune-8535-OriginallyMine.abc 151 ABC music file with the extracted tune(s)
Tune-8535-OriginallyMine.ps 6 PostScript
Tune-8535-OriginallyMine.txt 151 Plain-text file with the extracted tune(s)
Tune-8535-get.log 7450 Log file, useful mostly for debugging
Tune-85350-get.log 5972 Log file, useful mostly for debugging
Tune-85351-get.log 6829 Log file, useful mostly for debugging
Tune-85353-get.log 12701 Log file, useful mostly for debugging
Tune-85354-get.log 3484 Log file, useful mostly for debugging
Tune-85355-get.log 9368 Log file, useful mostly for debugging
Tune-85357-get.log 3648 Log file, useful mostly for debugging
Tune-85358-get.log 8699 Log file, useful mostly for debugging
Tune-85359-get.log 8476 Log file, useful mostly for debugging
These files should be available for 24 hours.