pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-46413-002_Olympic.ps) >>/Users/jc/w/tmp/Tune-46413-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JeanWhite/100_Popular_HRJCD/002_Olympic.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-46413-002_Olympic.abc 763 ABC music file with the extracted tune(s)
Tune-46413-002_Olympic.ps 38216 PostScript
Tune-46413-002_Olympic.txt 763 Plain-text file with the extracted tune(s)
Tune-46413-get.log 4571 Log file, useful mostly for debugging
These files should be available for 24 hours.