pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4815-CR64.ps) >>/Users/jc/w/tmp/Tune-4815-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CR64.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_48153.log 459795 Log file, useful mostly for debugging
Tune-4815-CR64.abc 1423 ABC music file with the extracted tune(s)
Tune-4815-CR64.ps 43883 PostScript
Tune-4815-CR64.txt 1423 Plain-text file with the extracted tune(s)
Tune-4815-get.log 4330 Log file, useful mostly for debugging
Tune-48150-get.log 1506 Log file, useful mostly for debugging
Tune-48151-get.log 5584 Log file, useful mostly for debugging
Tune-48153-get.log 3182 Log file, useful mostly for debugging
Tune-48154-get.log 1474 Log file, useful mostly for debugging
Tune-48158-get.log 6578 Log file, useful mostly for debugging
Tune-48159-get.log 9788 Log file, useful mostly for debugging
These files should be available for 24 hours.