pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-13680-milwsun1.ps) >>/Users/jc/w/tmp/Tune-13680-get.log 2>&1" returned status 256
http://www.abc2win.com/milwsun1.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-13680-get.log 4222 Log file, useful mostly for debugging
Tune-13680-milwsun1.abc 224 ABC music file with the extracted tune(s)
Tune-13680-milwsun1.ps 35461 PostScript
Tune-13680-milwsun1.txt 224 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.