pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4347-ViolettaHornpipe.ps) >>/Users/jc/w/tmp/Tune-4347-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ryan-cole/Tunes/ViolettaHornpipe.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Sess-43475.log 8337 Log file, useful mostly for debugging
Tune-4347-ViolettaHornpipe.abc 368 ABC music file with the extracted tune(s)
Tune-4347-ViolettaHornpipe.ps 35337 PostScript
Tune-4347-ViolettaHornpipe.txt 368 Plain-text file with the extracted tune(s)
Tune-4347-get.log 8121 Log file, useful mostly for debugging
Tune-43470-get.log 2914 Log file, useful mostly for debugging
Tune-43471-get.log 4072 Log file, useful mostly for debugging
These files should be available for 24 hours.