pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1010-k.ps) >>/Users/jc/w/tmp/Tune-1010-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/k.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_10102.log 391312 Log file, useful mostly for debugging
Coll_10103.log 275711 Log file, useful mostly for debugging
Tune-1010-get.log 6508 Log file, useful mostly for debugging
Tune-1010-k.abc 283 ABC music file with the extracted tune(s)
Tune-1010-k.ps 34148 PostScript
Tune-1010-k.txt 283 Plain-text file with the extracted tune(s)
Tune-10103-get.log 8458 Log file, useful mostly for debugging
Tune-10105-get.log 3131 Log file, useful mostly for debugging
Tune-10107-get.log 3377 Log file, useful mostly for debugging
These files should be available for 24 hours.