pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57554-allklez.ps) >>/Users/jc/w/tmp/Tune-57554-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/ifdo.ca/~seymour/runabc/allklez.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
Tune-57554-allklez.abc 569 ABC music file with the extracted tune(s)
Tune-57554-allklez.ps 36738 PostScript
Tune-57554-allklez.txt 569 Plain-text file with the extracted tune(s)
Tune-57554-get.log 12501 Log file, useful mostly for debugging
These files should be available for 24 hours.