pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7783-c.ps) >>/Users/jc/w/tmp/Tune-7783-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/c.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_77831.log 129497 Log file, useful mostly for debugging
Coll_77833.log 140387 Log file, useful mostly for debugging
Form_7783.log 815 Log file, useful mostly for debugging
Sess-77838.log 2941335 Log file, useful mostly for debugging
Tune-7783-c.abc 146 ABC music file with the extracted tune(s)
Tune-7783-c.ps 32145 PostScript
Tune-7783-c.txt 146 Plain-text file with the extracted tune(s)
Tune-7783-get.log 4194 Log file, useful mostly for debugging
Tune-77830-get.log 1407 Log file, useful mostly for debugging
Tune-77832-get.log 14070 Log file, useful mostly for debugging
Tune-77832-oneill_dmoi.abc 267 ABC music file with the extracted tune(s)
Tune-77832-oneill_dmoi.ps 34845 PostScript
Tune-77832-oneill_dmoi.txt 267 Plain-text file with the extracted tune(s)
Tune-77833-get.log 3646 Log file, useful mostly for debugging
Tune-77834-get.log 1407 Log file, useful mostly for debugging
Tune-77835-get.log 3185 Log file, useful mostly for debugging
Tune-77837-get.log 3244 Log file, useful mostly for debugging
Tune-77839-get.log 3415 Log file, useful mostly for debugging
These files should be available for 24 hours.