Hello everyone. I have the following model:

```
var
y
c
i
x
r
w
n
a
z
dz
;
varexo
eps_a
;
parameters
alpha
teta
gamma
sigma
varphi
gammai
rhoa
;
alpha = 0.4;
gamma = 0.4;
teta = 1.2;
sigma = 2;
varphi = 4;
gammai = 0.2;
rhoa = 0.85;
model (linear) ;
#gammax = alpha^2 ;
#gammac = 1 - gammai - gammax ;
y = gammac*c + gammai*i + gammax*x ;
w = y - n ;
w = sigma*c + varphi*n ;
c = c(+1) - (1/sigma)*r ;
z = z(-1) + dz ;
dz = gamma*i ;
y = a + z(-1) + (1-alpha)*n + alpha*x ;
x = n + (1/(1-alpha))*a ;
r = sigma*(c(+1) - c) ;
a = rhoa*a(-1) + eps_a ;
end;
steady;
check;
shocks ;
var eps_a ; stderr 1;
end;
stoch_simul(irf=80);
```

and I got the following error:

Error using print_info

The generalized Schur (QZ) decomposition failed. For more information, see the documentation for Lapack function dgges: info=30, n=3. You can also run model_diagnostics to get more information on what may cause this problem.

Can you help me to solve the issue?