pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9534-WAL.ps) >>/Users/jc/w/tmp/Tune-9534-get.log 2>&1" returned status 256
http://www.ibiblio.org/fiddlers/WAL.htm

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-9534-WAL.abc 368 ABC music file with the extracted tune(s)
Tune-9534-WAL.ps 36234 PostScript
Tune-9534-WAL.txt 368 Plain-text file with the extracted tune(s)
Tune-9534-get.log 8134 Log file, useful mostly for debugging
Tune-95343-get.log 4659 Log file, useful mostly for debugging
These files should be available for 24 hours.