pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3544-tunes.ps) >>/Users/jc/w/tmp/Tune-3544-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1791/Thompson/tunes.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_35440.log 572875 Log file, useful mostly for debugging
Coll_35448.log 1303341 Log file, useful mostly for debugging
Tune-3544-get.log 17630 Log file, useful mostly for debugging
Tune-3544-tunes.abc 16899 ABC music file with the extracted tune(s)
Tune-3544-tunes.ps 121254 PostScript
Tune-3544-tunes.txt 16899 Plain-text file with the extracted tune(s)
Tune-35440-get.log 5645 Log file, useful mostly for debugging
Tune-35442-get.log 5641 Log file, useful mostly for debugging
These files should be available for 24 hours.