pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-48085-___.ps) >>/Users/jc/w/tmp/Tune-48085-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/polka/Polka:Heel_and_Toe-DG-32-2.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-48085-___.abc 190 ABC music file with the extracted tune(s)
Tune-48085-___.ps 32718 PostScript
Tune-48085-___.txt 190 Plain-text file with the extracted tune(s)
Tune-48085-get.log 4212 Log file, useful mostly for debugging
These files should be available for 24 hours.