pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9429-t.ps) >>/Users/jc/w/tmp/Tune-9429-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/t.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_94293.log 253509 Log file, useful mostly for debugging
Coll_94295.log 113347 Log file, useful mostly for debugging
Coll_94298.log 138572 Log file, useful mostly for debugging
Coll_94299.log 261651 Log file, useful mostly for debugging
Form_94290.log 858 Log file, useful mostly for debugging
Form_94299.log 886 Log file, useful mostly for debugging
Tune-9429-get.log 4328 Log file, useful mostly for debugging
Tune-9429-t.abc 227 ABC music file with the extracted tune(s)
Tune-9429-t.ps 35191 PostScript
Tune-9429-t.txt 227 Plain-text file with the extracted tune(s)
Tune-94292-get.log 3473 Log file, useful mostly for debugging
Tune-94296-get.log 1374 Log file, useful mostly for debugging
These files should be available for 24 hours.