pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5469-p-q.ps) >>/Users/jc/w/tmp/Tune-5469-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/p-q.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_54690.log 140463 Log file, useful mostly for debugging
Form_54698.log 956 Log file, useful mostly for debugging
Tune-5469-get.log 282842 Log file, useful mostly for debugging
Tune-5469-p-q.abc 958 ABC music file with the extracted tune(s)
Tune-5469-p-q.ps 45574 PostScript
Tune-5469-p-q.txt 958 Plain-text file with the extracted tune(s)
Tune-54690-get.log 6652 Log file, useful mostly for debugging
These files should be available for 24 hours.