pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-89550-abc.ps) >>/Users/jc/w/tmp/Tune-89550-get.log 2>&1" returned status 256
http://jerryholland.com/tunes/abc.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_89550.log 148857 Log file, useful mostly for debugging
Tune-89550-abc.abc 862 ABC music file with the extracted tune(s)
Tune-89550-abc.ps 36032 PostScript
Tune-89550-abc.txt 862 Plain-text file with the extracted tune(s)
Tune-89550-get.log 7682 Log file, useful mostly for debugging
These files should be available for 24 hours.