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hello,
when I simulate a VAR model
smpl @all
genr u1=0.36*nrnd
genr u2=0.4+0.75*nrnd
smpl @first+1 @last
x=0.5*x(-1)+0.47*z(-1)+u1
z=0.2*x(-1)+0.9*z(-1)+u2
I need 1000 observations, but when I run the model a message appears "oveflow in x=0.5*x(-1)+0.47*z(-1)+u1" and only 200 observations are simulated and the rest are shown as NA.
please how can I obtain the 1000 observations.
NB: the parameters of the normal distribution of u1 and u2 are arbitrary (if it's necessary I can change the mean and the variance of u1 and u2)
thanks.

That is because your model is not stationary. Try smaller values for the coefficents. For instance, you can assign a different value (e.g. something smaller than 0.80) to the coefficent of z(-1) in the second equation...