pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-96969-KR28_B.ps) >>/Users/jc/w/tmp/Tune-96969-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/KC/KR28_B.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_96969.log 839 Log file, useful mostly for debugging
Tune-96969-KR28_B.abc 576 ABC music file with the extracted tune(s)
Tune-96969-KR28_B.ps 39137 PostScript
Tune-96969-KR28_B.txt 576 Plain-text file with the extracted tune(s)
Tune-96969-get.log 9839 Log file, useful mostly for debugging
These files should be available for 24 hours.