pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-20156-20981_MAGGY_LAWDER.ps) >>/Users/jc/w/tmp/Tune-20156-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/20981_MAGGY_LAWDER.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-20156-20981_MAGGY_LAWDER.abc 3938 ABC music file with the extracted tune(s)
Tune-20156-20981_MAGGY_LAWDER.ps 123409 PostScript
Tune-20156-20981_MAGGY_LAWDER.txt 3938 Plain-text file with the extracted tune(s)
Tune-20156-get.log 5472 Log file, useful mostly for debugging
These files should be available for 24 hours.