# Blanchard & Kahn conditions are not satisfied: indeterminacy Error

**URL:** <https://forum.dynare.org/t/blanchard-kahn-conditions-are-not-satisfied-indeterminacy-error/27352>\
**Category:** Stochastic simulations\
**Created:** [25 March 2025 00:51 UTC](https://forum.dynare.org/t/blanchard-kahn-conditions-are-not-satisfied-indeterminacy-error/27352 "2025-03-25T00:51:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cominem123](https://forum.dynare.org/letter_avatar_proxy/v4/letter/c/dec6dc/32.png) [@cominem123](https://forum.dynare.org/u/cominem123)\
**Post date:** [25 March 2025 00:51 UTC](https://forum.dynare.org/t/blanchard-kahn-conditions-are-not-satisfied-indeterminacy-error/27352/1 "2025-03-25T00:51:19Z")

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Dear Professor,

I keep getting the following message: “Blanchard & Kahn conditions are not satisfied: indeterminacy.”

Looking at the previous answers, I guess it has to do with the timing issue, but I don’t think I have made any.

Could you help me out professor? Thank you

Best,  
Jeremy  
[main.mod](https://forum.dynare.org/uploads/short-url/k039ZIwfEwmqwvujbWKLKbH1KI5.mod) (1.5 KB)  
[ss.m](https://forum.dynare.org/uploads/short-url/oYyv4Mxn0zvFsVbYN4RF1l9NPzM.m) (884 Bytes)

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**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\
**Post date:** [28 March 2025 11:49 UTC](https://forum.dynare.org/t/blanchard-kahn-conditions-are-not-satisfied-indeterminacy-error/27352/2 "2025-03-28T11:49:58Z")

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Check your timing.

```auto
theta = (lambda*l(-1) + eta*s(-1))/d_u(-1);

```

looks odd as everything on the right is predetermined. That would make `theta` predetermined as well. Put differently, it looks like the equation must have a t timing for all variables.

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<div class="post-metadata">

**Author:** ![cominem123](https://forum.dynare.org/letter_avatar_proxy/v4/letter/c/dec6dc/32.png) [@cominem123](https://forum.dynare.org/u/cominem123)\
**Post date:** [1 April 2025 01:53 UTC](https://forum.dynare.org/t/blanchard-kahn-conditions-are-not-satisfied-indeterminacy-error/27352/3 "2025-04-01T01:53:38Z")

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Hello Professor,

I fixed the first line, but the same error still appears. Do you have an idea what could be wrong? Thank you.  
[main.mod](https://forum.dynare.org/uploads/short-url/1qMZa2qEf2Aj5MHVYSxgipZphPm.mod) (1.6 KB)  
[ss.m](https://forum.dynare.org/uploads/short-url/ziV1JZw3ugmhtxVOoy9Z0OZHihn.m) (1019 Bytes)

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<div class="post-metadata">

**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\
**Post date:** [1 April 2025 10:10 UTC](https://forum.dynare.org/t/blanchard-kahn-conditions-are-not-satisfied-indeterminacy-error/27352/4 "2025-04-01T10:10:48Z")

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You need to check all equations for mistakes like timing errors. If nothing else works, use a simpler version that works and only then add features.