pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4642-1803_Preston.ps) >>/Users/jc/w/tmp/Tune-4642-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/dfty/1803_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
Coll_46422.log 282925 Log file, useful mostly for debugging
Tune-4642-1803_Preston.abc 20562 ABC music file with the extracted tune(s)
Tune-4642-1803_Preston.ps 136557 PostScript
Tune-4642-1803_Preston.txt 20562 Plain-text file with the extracted tune(s)
Tune-4642-get.log 17303 Log file, useful mostly for debugging
Tune-46421-get.log 3843 Log file, useful mostly for debugging
Tune-46428-get.log 5017 Log file, useful mostly for debugging
These files should be available for 24 hours.