pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4657-s.ps) >>/Users/jc/w/tmp/Tune-4657-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/redhawk.org/zouki/s.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_46579.log 260559 Log file, useful mostly for debugging
Form_46578.log 872 Log file, useful mostly for debugging
Tune-4657-get.log 4183 Log file, useful mostly for debugging
Tune-4657-s.abc 264 ABC music file with the extracted tune(s)
Tune-4657-s.ps 34196 PostScript
Tune-4657-s.txt 264 Plain-text file with the extracted tune(s)
Tune-46570-get.log 3846 Log file, useful mostly for debugging
Tune-46573-get.log 5716 Log file, useful mostly for debugging
These files should be available for 24 hours.