st: Ordered Probit with Panel Data [reoprob]

["ALICE DOBSON" <alice_dobson@hotmail.com>]

HI all,
I use Stata 9.1. I apologise for repeating this question in case someone 
already addressed the same and I missed it. I had earlier posted this 
question on Mar 29, 06.

I ran an oprobit with a panel data and got the estimates. Of course, the 
regression model does not consider the panel nature of the data. But, when I 
am running an reoprob with exactly the same variables I get the following 
message.

conformability error
r(503);

When I checked the same I found the following description, which I do not 
understand.

"You have issued a matrix command attempting to combine two matrices that 
are not conformable, for example, multiplying a 3x2 matrix by a 3x3 matrix.  
You will also get this message if you attempt an operation that requires a 
square matrix and the matrix is not square."

Could someone please help me in understanding what I need to do so that I 
can get an estimate of the random-effect ordered probit model?
Best,
Alice

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