MUX2?

[Al Arduengo]

I sure hope this is not a faq. I searched the docs I have but could
not find any mention. I am experimenting with schematic view usage and
created a version of a DCA encoder. One of the components used is a
2->1 mux. I connected two inputs, an output and a select. When I try to
run a simulation on the whole contraption, I get an error in the
message window reporting that MUX2 is an unknown model. I inspected
the VHDL and the component and node definitions are there with the
inputs and output correctly named. The select, however, is called
UNKNOWN###### where ###### is a number.  I assume it is called this
because of the fact that it is a bus input with no name but is 
connected to a named wire. Anyway, is there anything I should know 
specifically about muxes or perhaps the use of bus to wire connection?
Strangely, for some time an xnor2 I used was also complained about 
just like the mux2 but now, after recompiling electric, it seems to 
be acceptable in the vhdl view.

My thanks for any help offered.
-Al
-- 
-Al Arduengo
------------
"Actual courtroom exchange:  Q: Mr. Slatery, you went on a rather
 elaborate honeymoon, didn't  you?  A: I went to Europe, Sir.  Q: And 
 you took your new wife?"