EViews.com

Hi,
Very thanks for help.
I'am using month data of 2000m01 to 2014m01, and has built equation using markov regime swithc model, which has dynamic y(t) on c and y(t-1), and has chosed "regime specific error variances", after the estimation, when forecast, eviews 8 always alarm me that "SIGMA is not defined-", I want to know what wrong with the model? and how to forecast on Markov model?
Very thanks.
Tanghan

Sounds like there might be an issue with EViews. Can you post your workfile? What's the build date on your copy of EViews?

Very thanks for your help.
At first i thought maybe my data has some flaw, so I changed to the data which provided by eviews 8-GNP_hamilton, but the question remains the same. I changed the eqation by dynamic: g c g(-1), the non-switching regressors still are-ar(1) ar(2) ar(3) ar(4), and i chosed the "regime specific error variances", after the estimation, I want to forecast the dependent variable-g, but forecast has teld me that " the SIGMA is not defined". I don't know what wrong with the equation?
Another,
I fined that the forecast dialog is-"SIGMAf" not the variable i want-the dependent variable "gf", then how to use the markov switch model to forecast the dependent variable?
Thank you for spending time to answer me.
Tanghan