pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4160-00000_Title.ps) >>/Users/jc/w/tmp/Tune-4160-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Button_Whitaker/SelectionOfDancesReelsAndWaltzes/00000_Title.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
Coll_41609.log 144017 Log file, useful mostly for debugging
Tune-4160-00000_Title.abc 1006 ABC music file with the extracted tune(s)
Tune-4160-00000_Title.ps 32340 PostScript
Tune-4160-00000_Title.txt 1006 Plain-text file with the extracted tune(s)
Tune-4160-get.log 5324 Log file, useful mostly for debugging
These files should be available for 24 hours.