pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8302-Knotted_Piece_of_String.ps) >>/Users/jc/w/tmp/Tune-8302-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/OriginallyMine/Knotted_Piece_of_String.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_83026.log 663681 Log file, useful mostly for debugging
Tune-8302-Knotted_Piece_of_String.abc 1220 ABC music file with the extracted tune(s)
Tune-8302-Knotted_Piece_of_String.ps 37833 PostScript
Tune-8302-Knotted_Piece_of_String.txt 1220 Plain-text file with the extracted tune(s)
Tune-8302-get.log 4769 Log file, useful mostly for debugging
These files should be available for 24 hours.