pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35456-MID_MILK.ps) >>/Users/jc/w/tmp/Tune-35456-get.log 2>&1" returned status 256
http://www.ibiblio.org/fiddlers/MID_MILK.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
Coll_35456.log 127558 Log file, useful mostly for debugging
Tune-35456-MID_MILK.abc 347 ABC music file with the extracted tune(s)
Tune-35456-MID_MILK.ps 35812 PostScript
Tune-35456-MID_MILK.txt 347 Plain-text file with the extracted tune(s)
Tune-35456-get.log 7994 Log file, useful mostly for debugging
These files should be available for 24 hours.