# Problem with eigenvalue

Hello, everybody. I have a problem of eigenvalue. I have tried lots of methods such as changing the parameters or initial value, but those do not work. I sincerely hope that someone can help me. Thanks a lot. And here is the result of my codes.

``````Configuring Dynare ...
[mex] Generalized QZ.
[mex] Sylvester equation solution.
[mex] Kronecker products.
[mex] Sparse kronecker products.
[mex] Local state space iteration (second order).
[mex] Bytecode evaluation.
[mex] k-order perturbation solver.
[mex] k-order solution simulation.
[mex] Quasi Monte-Carlo sequence (Sobol).
[mex] Markov Switching SBVAR.

Using 64-bit preprocessor
Starting Dynare (version 4.5.7).
Starting preprocessing of the model file ...
Found 50 equation(s).
Evaluating expressions...done
Computing static model derivatives:
- order 1
Computing dynamic model derivatives:
- order 1
- order 2
Processing outputs ...
done
Preprocessing completed.

x0 =

1.0e+04 *

0.0000    2.7278    0.0000    0.0000    0.0000

Norm of      First-order
Iteration  Func-count     f(x)          step          optimality
0          6     7.60708e-05                           7.4
1         12     1.85211e-06     0.00316776           1.65
2         18     6.34728e-08     0.00250835          0.275
3         24     4.97948e-08    0.000692634       0.000686
4         30     4.96614e-08    0.000676148        0.00858
5         36     4.94527e-08    0.000558325        0.00138
6         42     4.93268e-08    0.000562854        0.00521
7         48      4.9166e-08    0.000556477        0.00267
8         54     4.90414e-08    0.000519896        0.00439
9         60     4.89033e-08     0.00056245         0.0042
10         66     4.87772e-08    0.000500084        0.00431
11         72     4.86549e-08     0.00056682        0.00571
12         78     4.85256e-08    0.000491437        0.00572
13         84     4.84114e-08    0.000570044        0.00613
14         90     4.82817e-08    0.000490652        0.00468
15         96      4.8187e-08    0.000575116        0.00947

Equation solved, inaccuracy possible.

The vector of function values is near zero, as measured by the selected value
of the function tolerance. However, the last step was ineffective.

<stopping criteria details>

ytf     		 0
rmt     		 0
ct      		 0
it      		 0
gt      		 0
gdpt    		 0
kt      		 0
lamt    		 0
qtk     		 0
Ht      		 0
Hst     		 0
Hpt     		 0
yst     		 0
ypt     		 0
kst     		 0
kpt     		 0
nst     		 0
npt     		 0
bst     		 0
bpt     		 0
Ast     		 0
Apt     		 0
wstbar  		 0
wptbar  		 0
mt      		 0
wt      		 0
wset    		 0
wpet    		 0
rtk     		 0
Rt      		 0
Rst     		 0
Rpt     		 0
pait    		 0
pwt     		 0
pst     		 0
ppt     		 0
taot    		 0
dt      		 0
dgs     		 0
fs      		 0
dfs     		 0
nspaig  		 0
nspaigb 		 0
dgp     		 0
fp      		 0
dfp     		 0
nppaig  		 0
nppaigb 		 0
gp      		 0
gs      		 0
Error in  print_info (line 54)
One of the eigenvalues is close to 0/0 (the absolute value of numerator and denominator is smaller than 1e-06!
If you believe that the model has a unique solution you can try to reduce the value of qz_zero_threshold.

Error in  check (line 76)
print_info(info, 0, options);

Error in  mod0526d (line 701)
oo_.dr.eigval = check(M_,options_,oo_);

Error in  dynare (line 235)
evalin('base',fname) ;
``````

What does `model_diagnostics` return?

No obvious problems with this mod-file were detected.

Given this singularity, I can only recommend debugging your model by starting with a simplified version.

Okay, thank you very much.