Multiple-Clock Domain with 2 Nios?

I haven't seen those error message before, but re-reading your original post has made me curious. You say that both processors boot out of Flash. That would mean that each needs a bootloader (I don't think you will get two of them). Can you copy and paste the text from the flash programmer into the post. I'll take a look and see what's going on.

Back to that error message. Do you have a signal in your system that is usually a bus, but has been minimized to a single line? I have never tried to declare a std_logic_vector (0 downto 0) before but I thought that would be a perfectly valid statement (valid, but not clean coding). If I don&#39;t get back to you right away send another message since I happen to be working with the clock crossing features right now (before the weekend roles around and I start forgetting things http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif ).