pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-44816-my_shining_hour.ps) >>/Users/jc/w/tmp/Tune-44816-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jazz/my_shining_hour.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_44816.log 962 Log file, useful mostly for debugging
Tune-44816-get.log 9031 Log file, useful mostly for debugging
Tune-44816-my_shining_hour.abc 1511 ABC music file with the extracted tune(s)
Tune-44816-my_shining_hour.ps 40912 PostScript
Tune-44816-my_shining_hour.txt 1511 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.