pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-59304-351_Pretty_Bettsey.ps) >>/Users/jc/w/tmp/Tune-59304-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1767/Thompson/351_Pretty_Bettsey.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_59304.log 603680 Log file, useful mostly for debugging
Tune-59304-351_Pretty_Bettsey.abc 1117 ABC music file with the extracted tune(s)
Tune-59304-351_Pretty_Bettsey.ps 34660 PostScript
Tune-59304-351_Pretty_Bettsey.txt 1117 Plain-text file with the extracted tune(s)
Tune-59304-get.log 4666 Log file, useful mostly for debugging
These files should be available for 24 hours.