pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9992-2271_Swallow_Tail.ps) >>/Users/jc/w/tmp/Tune-9992-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM2/2271_Swallow_Tail.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-9992-2271_Swallow_Tail.abc 425 ABC music file with the extracted tune(s)
Tune-9992-2271_Swallow_Tail.ps 34014 PostScript
Tune-9992-2271_Swallow_Tail.txt 425 Plain-text file with the extracted tune(s)
Tune-9992-get.log 4587 Log file, useful mostly for debugging
Tune-99920-get.log 12897 Log file, useful mostly for debugging
Tune-99924-get.log 5491 Log file, useful mostly for debugging
Tune-99926-get.log 16256 Log file, useful mostly for debugging
Tune-99927-get.log 9409 Log file, useful mostly for debugging
Tune-99928-get.log 9202 Log file, useful mostly for debugging
These files should be available for 24 hours.