# Problems with integer stack size

**URL:** <https://discourse.julialang.org/t/problems-with-integer-stack-size/89192>\
**Category:** Optimization (Mathematical)\
**Tags:** ipopt\
**Created:** [October 24, 2022, 12:36pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192 "2022-10-24T12:36:09Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![mb96](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mb96/32/45786_2.png) [@mb96](https://discourse.julialang.org/u/mb96)\
**Post date:** [October 24, 2022, 12:36pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/1 "2022-10-24T12:36:09Z")

</div>

Hi,

I am solving a optimization problem with 13104 variables the maximization is looped over some set of initial conditions. At some point I get the following problem:

 ![Captura de Pantalla 2022-10-24 a la(s) 08.35.08](https://global.discourse-cdn.com/julialang/original/3X/d/6/d67e344abdc7553bc77761f91d536ef2e216cd9d.png)

Can some provide some information about what integer stack size means or what the problem is likely related too?

Thanks a lot.

---

<div class="post-metadata">

**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [October 24, 2022, 6:07pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/2 "2022-10-24T18:07:33Z")

</div>

Please provide a reproducible example

---

<div class="post-metadata">

**Author:** ![digital\_carver](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/digital_carver/32/33818_2.png) [@digital\_carver](https://discourse.julialang.org/u/digital_carver)\
**Post date:** [October 24, 2022, 6:12pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/3 "2022-10-24T18:12:08Z")

</div>

Do you have an old version of MUMPS installed? [This post](https://list.coin-or.org/pipermail/ipopt/2020-January/004715.html) mentions the same error message, and [the suggestion](https://list.coin-or.org/pipermail/ipopt/2020-January/004716.html) is to use MUMPS 5.1.0 or above, or a different solver backend.

---

<div class="post-metadata">

**Author:** ![mb96](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mb96/32/45786_2.png) [@mb96](https://discourse.julialang.org/u/mb96)\
**Post date:** [October 24, 2022, 7:12pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/4 "2022-10-24T19:12:14Z")

</div>

Thanks for the pointer but it seems like I am using the latest version which is in fact 1.3.0 and I still get the problem.

---

<div class="post-metadata">

**Author:** ![mb96](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mb96/32/45786_2.png) [@mb96](https://discourse.julialang.org/u/mb96)\
**Post date:** [October 24, 2022, 7:13pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/5 "2022-10-24T19:13:51Z")

</div>

I am not allowed to give a repdroducible example sorry. But I was still hoping to get some insight on what the error could mean and if it is a frequent one and how people generally approach it.

---

<div class="post-metadata">

**Author:** ![Oscar\_Smith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oscar_smith/32/25343_2.png) [@Oscar\_Smith](https://discourse.julialang.org/u/Oscar_Smith)\
**Post date:** [October 24, 2022, 7:14pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/6 "2022-10-24T19:14:15Z")

</div>

It’s not frequent.

---

<div class="post-metadata">

**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [October 24, 2022, 7:26pm UTC](https://discourse.julialang.org/t/problems-with-integer-stack-size/89192/7 "2022-10-24T19:26:15Z")

</div>

> I am not allowed to give a repdroducible example sorry.

It’s hard to offer advice without a reproducible example, so that means we likely can’t help.

What is the full output of the Ipopt solve?

> if it is a frequent one

I’ve never encountered it, but there are a few hits if you Google ([[Ipopt] Segmentation fault due to MUMPS memory allocation](https://list.coin-or.org/pipermail/ipopt/2020-January/004715.html)).

It most likely relates to running out of memory.

You could try playing with the `mumps_mem_percent` option, [Ipopt: Ipopt Options](https://coin-or.github.io/Ipopt/OPTIONS.html#OPT_mumps_mem_percent).

Otherwise, try a different linear solver: [GitHub - jump-dev/Ipopt.jl: Julia interface to the Ipopt nonlinear solver](https://github.com/jump-dev/Ipopt.jl#linear-solvers)