pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2690-1798_Preston.ps) >>/Users/jc/w/tmp/Tune-2690-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/dfty/1798_Preston.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_26904.log 828 Log file, useful mostly for debugging
Tune-2690-1798_Preston.abc 20528 ABC music file with the extracted tune(s)
Tune-2690-1798_Preston.ps 129903 PostScript
Tune-2690-1798_Preston.txt 20528 Plain-text file with the extracted tune(s)
Tune-2690-get.log 17207 Log file, useful mostly for debugging
Tune-26902-get.log 7940 Log file, useful mostly for debugging
Tune-26904-get.log 3515 Log file, useful mostly for debugging
Tune-26906-get.log 3780 Log file, useful mostly for debugging
These files should be available for 24 hours.