pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4181-052_Bonnie_Dundee.ps) >>/Users/jc/w/tmp/Tune-4181-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Chappell/052_Bonnie_Dundee.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_4181.log 450009 Log file, useful mostly for debugging
Coll_41810.log 472408 Log file, useful mostly for debugging
Coll_41813.log 452809 Log file, useful mostly for debugging
Coll_41816.log 445810 Log file, useful mostly for debugging
Form_41810.log 984 Log file, useful mostly for debugging
Form_41815.log 2007 Log file, useful mostly for debugging
Tune-4181-052_Bonnie_Dundee.abc 713 ABC music file with the extracted tune(s)
Tune-4181-052_Bonnie_Dundee.ps 37689 PostScript
Tune-4181-052_Bonnie_Dundee.txt 713 Plain-text file with the extracted tune(s)
Tune-4181-get.log 4673 Log file, useful mostly for debugging
Tune-41811-get.log 5032 Log file, useful mostly for debugging
These files should be available for 24 hours.