pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21539-004_Manchester.ps) >>/Users/jc/w/tmp/Tune-21539-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JeanWhite/100_Popular_HRJCD/004_Manchester.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_21539.log 451410 Log file, useful mostly for debugging
Tune-21539-004_Manchester.abc 741 ABC music file with the extracted tune(s)
Tune-21539-004_Manchester.ps 37959 PostScript
Tune-21539-004_Manchester.txt 741 Plain-text file with the extracted tune(s)
Tune-21539-get.log 4644 Log file, useful mostly for debugging
These files should be available for 24 hours.