# Even iterative solver cannot solve large number of elements?

**URL:** https://calculix.discourse.group/t/even-iterative-solver-cannot-solve-large-number-of-elements/1710
**Category:** Uncategorized
**Created:** [June 17, 2023, 3:17pm UTC](https://calculix.discourse.group/t/even-iterative-solver-cannot-solve-large-number-of-elements/1710 "2023-06-17T15:17:33Z")
**Posts on this page:** 1
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### Author: ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)
#### Post date: [June 17, 2023, 3:36pm UTC](https://calculix.discourse.group/t/even-iterative-solver-cannot-solve-large-number-of-elements/1710/2 "2023-06-17T15:36:30Z")

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Can’t you simplify the model a bit ? Are all those small features absolutely necessary ? It’s better to avoid such huge meshes.

> [@hogglife](#):
>
> Is there free mesh tool to generate hexhedron except by sweep method? It seems the Hex\_i\_j\_k in Salome uses sweep method and I guess my model cannot be meshed with sweep method.

Try with Gmsh. Many models can be partitioned in such a way that they become sweep-mesheable. Otherwise, you have to stick with tetrahedrons since the hexa block technique is usually not available.

> [@hogglife](#):
>
> I heard the Pardiso solver has a out-of-core mode. Is it possible my mesh be solved by that mode of Pardiso?

Give it a try: [Calculix with pardiso OUT-OF-CORE mode](https://calculix.discourse.group/t/calculix-with-pardiso-out-of-core-mode/1676)

But most likely you will end up having to reduce the mesh density anyway.

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