Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/AdvancedSD/PaulBackstrom-LfD.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9868-PaulBackstrom-LfD.ps) >>/Users/jc/w/tmp/Tune-9868-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AdvancedSD/PaulBackstrom-LfD.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_98680.log 900027 Log file, useful mostly for debugging
Coll_98689.log 2057797 Log file, useful mostly for debugging
Find_98684.log 1423 Log file, useful mostly for debugging
Tune-9868-PaulBackstrom-LfD.abc 160 ABC music file with the extracted tune(s)
Tune-9868-PaulBackstrom-LfD.ps 6 PostScript
Tune-9868-PaulBackstrom-LfD.txt 160 Plain-text file with the extracted tune(s)
Tune-9868-get.log 8439 Log file, useful mostly for debugging
Tune-98680-get.log 4474 Log file, useful mostly for debugging
Tune-98681-get.log 3542 Log file, useful mostly for debugging
Tune-98683-get.log 4666 Log file, useful mostly for debugging
Tune-98685-get.log 13001 Log file, useful mostly for debugging
Tune-98687-get.log 13444 Log file, useful mostly for debugging
Tune-98688-get.log 3566 Log file, useful mostly for debugging
Tune-98689-get.log 12561 Log file, useful mostly for debugging
These files should be available for 24 hours.