pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1579-t.ps) >>/Users/jc/w/tmp/Tune-1579-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_15795.log 260559 Log file, useful mostly for debugging
Coll_15798.log 389856 Log file, useful mostly for debugging
Tune-1579-get.log 4472 Log file, useful mostly for debugging
Tune-1579-t.abc 846 ABC music file with the extracted tune(s)
Tune-1579-t.ps 36146 PostScript
Tune-1579-t.txt 846 Plain-text file with the extracted tune(s)
Tune-15793-get.log 36942 Log file, useful mostly for debugging
Tune-15795-get.log 3117 Log file, useful mostly for debugging
These files should be available for 24 hours.