pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-53633-198_Nabob.ps) >>/Users/jc/w/tmp/Tune-53633-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Straight_Skillern/198_Nabob.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_53633.log 260446 Log file, useful mostly for debugging
Form_53633.log 829 Log file, useful mostly for debugging
Tune-53633-198_Nabob.abc 805 ABC music file with the extracted tune(s)
Tune-53633-198_Nabob.ps 33842 PostScript
Tune-53633-198_Nabob.txt 805 Plain-text file with the extracted tune(s)
Tune-53633-get.log 4483 Log file, useful mostly for debugging
These files should be available for 24 hours.