pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6549-l.ps) >>/Users/jc/w/tmp/Tune-6549-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/l.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
Form_65490.log 945 Log file, useful mostly for debugging
Tune-6549-get.log 259759 Log file, useful mostly for debugging
Tune-6549-l.abc 755 ABC music file with the extracted tune(s)
Tune-6549-l.ps 44173 PostScript
Tune-6549-l.txt 755 Plain-text file with the extracted tune(s)
Tune-65499-0863_dp.abc 0 ABC music file with the extracted tune(s)
Tune-65499-0863_dp.txt 0 Plain-text file with the extracted tune(s)
Tune-65499-get.log 3142 Log file, useful mostly for debugging
These files should be available for 24 hours.