pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2645-Gold_Ring.ps) >>/Users/jc/w/tmp/Tune-2645-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/CCD/Gold_Ring.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_26451.log 505437 Log file, useful mostly for debugging
Coll_26452.log 137646 Log file, useful mostly for debugging
Coll_26453.log 264661 Log file, useful mostly for debugging
Coll_26456.log 264661 Log file, useful mostly for debugging
Form_26458.log 870 Log file, useful mostly for debugging
Tune-2645-Gold_Ring.abc 1173 ABC music file with the extracted tune(s)
Tune-2645-Gold_Ring.ps 36975 PostScript
Tune-2645-Gold_Ring.txt 1173 Plain-text file with the extracted tune(s)
Tune-2645-get.log 4340 Log file, useful mostly for debugging
Tune-26450-get.log 7696 Log file, useful mostly for debugging
Tune-26451-get.log 5173 Log file, useful mostly for debugging
Tune-26454-get.log 86494 Log file, useful mostly for debugging
Tune-26456-get.log 7159 Log file, useful mostly for debugging
Tune-26458-get.log 6248 Log file, useful mostly for debugging
These files should be available for 24 hours.