pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88642-m.ps) >>/Users/jc/w/tmp/Tune-88642-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/atrilcoral.com/m.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_88642.log 859 Log file, useful mostly for debugging
Tune-88642-get.log 4476 Log file, useful mostly for debugging
Tune-88642-m.abc 385 ABC music file with the extracted tune(s)
Tune-88642-m.ps 34588 PostScript
Tune-88642-m.txt 385 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.