pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-83877-21441_Marselloes_Hymn.ps) >>/Users/jc/w/tmp/Tune-83877-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/21441_Marselloes_Hymn.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-83877-21441_Marselloes_Hymn.abc 779 ABC music file with the extracted tune(s)
Tune-83877-21441_Marselloes_Hymn.ps 39104 PostScript
Tune-83877-21441_Marselloes_Hymn.txt 779 Plain-text file with the extracted tune(s)
Tune-83877-get.log 4615 Log file, useful mostly for debugging
These files should be available for 24 hours.