Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/mazurka/OriginallyMine.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3917-OriginallyMine.ps) >>/Users/jc/w/tmp/Tune-3917-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/mazurka/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_39176.log 291811 Log file, useful mostly for debugging
Form_39176.log 1011 Log file, useful mostly for debugging
Tune-3917-OriginallyMine.abc 154 ABC music file with the extracted tune(s)
Tune-3917-OriginallyMine.ps 6 PostScript
Tune-3917-OriginallyMine.txt 154 Plain-text file with the extracted tune(s)
Tune-3917-get.log 5411 Log file, useful mostly for debugging
Tune-39174-get.log 6646 Log file, useful mostly for debugging
Tune-39175-get.log 4209 Log file, useful mostly for debugging
Tune-39177-Garden_of_Daisies_974-D-48-3.abc 856 ABC music file with the extracted tune(s)
Tune-39177-Garden_of_Daisies_974-D-48-3.txt 856 Plain-text file with the extracted tune(s)
Tune-39177-get.log 9136 Log file, useful mostly for debugging
Tune-39178-get.log 9912 Log file, useful mostly for debugging
These files should be available for 24 hours.