pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3246-w.ps) >>/Users/jc/w/tmp/Tune-3246-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/atrilcoral.com/w.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_32467.log 133127 Log file, useful mostly for debugging
Coll_32469.log 140992 Log file, useful mostly for debugging
List32468.log 90 Log file, useful mostly for debugging
Tune-3246-get.log 4158 Log file, useful mostly for debugging
Tune-3246-w.abc 231 ABC music file with the extracted tune(s)
Tune-3246-w.ps 32994 PostScript
Tune-3246-w.txt 231 Plain-text file with the extracted tune(s)
Tune-32469-get.log 3772 Log file, useful mostly for debugging
These files should be available for 24 hours.