pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92702-Camargo.ps) >>/Users/jc/w/tmp/Tune-92702-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnWalsh/Camargo.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-92702-Camargo.abc 1321 ABC music file with the extracted tune(s)
Tune-92702-Camargo.ps 39412 PostScript
Tune-92702-Camargo.txt 1321 Plain-text file with the extracted tune(s)
Tune-92702-get.log 4303 Log file, useful mostly for debugging
These files should be available for 24 hours.