pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-162-Banks.ps) >>/Users/jc/w/tmp/Tune-162-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/hornpipe/Banks.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_1620.log 284329 Log file, useful mostly for debugging
Coll_16218.log 396730 Log file, useful mostly for debugging
Coll_16224.log 468388 Log file, useful mostly for debugging
Coll_1625.log 424833 Log file, useful mostly for debugging
Coll_16271.log 400945 Log file, useful mostly for debugging
Coll_16274.log 299784 Log file, useful mostly for debugging
Coll_16295.log 398135 Log file, useful mostly for debugging
Coll_16297.log 295569 Log file, useful mostly for debugging
Tune-162-Banks.abc 950 ABC music file with the extracted tune(s)
Tune-162-Banks.ps 40580 PostScript
Tune-162-Banks.txt 950 Plain-text file with the extracted tune(s)
Tune-162-get.log 4780 Log file, useful mostly for debugging
Tune-16207-get.log 4388 Log file, useful mostly for debugging
Tune-16228-get.log 4132 Log file, useful mostly for debugging
Tune-1623-get.log 5485 Log file, useful mostly for debugging
Tune-16261-get.log 3524 Log file, useful mostly for debugging
Tune-16272-get.log 3522 Log file, useful mostly for debugging
Tune-16274-get.log 5578 Log file, useful mostly for debugging
Tune-16279-get.log 4169 Log file, useful mostly for debugging
Tune-16282-get.log 4866 Log file, useful mostly for debugging
Tune-16295-get.log 5253 Log file, useful mostly for debugging
Tune-16297-get.log 5437 Log file, useful mostly for debugging
These files should be available for 24 hours.