pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4436-W-Allen.ps) >>/Users/jc/w/tmp/Tune-4436-get.log 2>&1" returned status 256
http://www.alfwarnock.info/alfs/abc/W-Allen.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
Form_4436.log 872 Log file, useful mostly for debugging
Form_44367.log 837 Log file, useful mostly for debugging
Tune-4436-W-Allen.abc 352 ABC music file with the extracted tune(s)
Tune-4436-W-Allen.ps 35890 PostScript
Tune-4436-W-Allen.txt 352 Plain-text file with the extracted tune(s)
Tune-4436-get.log 8256 Log file, useful mostly for debugging
Tune-44360-get.log 3936 Log file, useful mostly for debugging
Tune-44361-get.log 5172 Log file, useful mostly for debugging
Tune-44364-get.log 4433 Log file, useful mostly for debugging
Tune-44366-get.log 9300 Log file, useful mostly for debugging
These files should be available for 24 hours.