pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-33037-1798_Preston.ps) >>/Users/jc/w/tmp/Tune-33037-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1798_Preston.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_33037.log 466810 Log file, useful mostly for debugging
Form_33037.log 968 Log file, useful mostly for debugging
Tune-33037-1798_Preston.abc 20528 ABC music file with the extracted tune(s)
Tune-33037-1798_Preston.ps 130488 PostScript
Tune-33037-1798_Preston.txt 20528 Plain-text file with the extracted tune(s)
Tune-33037-get.log 17133 Log file, useful mostly for debugging
These files should be available for 24 hours.