pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8670-s.ps) >>/Users/jc/w/tmp/Tune-8670-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/s.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_8670.log 330383 Log file, useful mostly for debugging
Coll_86701.log 277899 Log file, useful mostly for debugging
Coll_86704.log 67424 Log file, useful mostly for debugging
Coll_86708.log 65804 Log file, useful mostly for debugging
Find_86709.log 1447 Log file, useful mostly for debugging
Form_86702.log 756 Log file, useful mostly for debugging
Form_86707.log 751 Log file, useful mostly for debugging
Form_86709.log 762 Log file, useful mostly for debugging
Tune-8670-get.log 4208 Log file, useful mostly for debugging
Tune-8670-s.abc 239 ABC music file with the extracted tune(s)
Tune-8670-s.ps 34116 PostScript
Tune-8670-s.txt 239 Plain-text file with the extracted tune(s)
Tune-86700-get.log 70085 Log file, useful mostly for debugging
Tune-86705-get.log 4145 Log file, useful mostly for debugging
Tune-86706-get.log 206195 Log file, useful mostly for debugging
These files should be available for 24 hours.