# Error: The found parameter is not suitable for the use on the required mesh

**URL:** <https://discourse.opengeosys.org/t/error-the-found-parameter-is-not-suitable-for-the-use-on-the-required-mesh/1769>\
**Category:** Help & Support\
**Tags:** ogs6\
**Created:** [December 4, 2025, 3:32pm UTC](https://discourse.opengeosys.org/t/error-the-found-parameter-is-not-suitable-for-the-use-on-the-required-mesh/1769 "2025-12-04T15:32:27Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![fvehling](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/f/b9bd4f/32.png) [@fvehling](https://discourse.opengeosys.org/u/fvehling)\
**Post date:** [December 4, 2025, 3:32pm UTC](https://discourse.opengeosys.org/t/error-the-found-parameter-is-not-suitable-for-the-use-on-the-required-mesh/1769/1 "2025-12-04T15:32:27Z")

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I have following problem:  
"error: The found parameter is not suitable for the use on the required mesh.  
The parameter’s domain of definition mesh ‘initial\_condition’ differs from the used mesh ‘top\_cigar\_lake’. The same mesh (the same name) has to be referenced in the project file. Possible reasons are:

- the parameter used for the initial condition is not defined on the bulk mesh,
- the parameter’s domain of definition mesh differs from the boundary condition or source term domain of definition mesh."

What can be the problem if the stated “Possible reasons” could be ruled out?

The problem occures when an output data file from a former simulation on the same mesh is used as an bulk input mesh to use the data as initial conditions

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**Author:** ![fvehling](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/f/b9bd4f/32.png) [@fvehling](https://discourse.opengeosys.org/u/fvehling)\
**Post date:** [December 4, 2025, 4:36pm UTC](https://discourse.opengeosys.org/t/error-the-found-parameter-is-not-suitable-for-the-use-on-the-required-mesh/1769/2 "2025-12-04T16:36:33Z")

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Ok I found my problem. The two meshes ‘initial\_condition’ and ‘top\_cigar\_lake’ have to be identical and should have the same size. Is this correct?

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**Author:** ![chleh](https://discourse.opengeosys.org/user_avatar/discourse.opengeosys.org/chleh/32/854_2.png) [@chleh](https://discourse.opengeosys.org/u/chleh)\
**Post date:** [December 4, 2025, 6:18pm UTC](https://discourse.opengeosys.org/t/error-the-found-parameter-is-not-suitable-for-the-use-on-the-required-mesh/1769/3 "2025-12-04T18:18:47Z")

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That depends.

`top_cigar_lake` sounds like a boundary mesh. `initial_condition` sounds like a mesh that covers the entire simulation domain. But I assume your first `<mesh>` in the prj file is not `initial_condition`.

Is the offending parameter a constant one? Then it might be possible to omit the `<mesh>` configuration of the parameter (it’s optional and defaults to the bulk mesh, see [here](https://doxygen.opengeosys.org/stable/d4/ddd/ogs_file_param __prj__ parameters __parameter__ mesh.html)). Omitting `<mesh>` might work for other parameters, too.

Best regards,  
Christoph

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**Author:** ![fvehling](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/f/b9bd4f/32.png) [@fvehling](https://discourse.opengeosys.org/u/fvehling)\
**Post date:** [January 21, 2026, 3:49pm UTC](https://discourse.opengeosys.org/t/error-the-found-parameter-is-not-suitable-for-the-use-on-the-required-mesh/1769/4 "2026-01-21T15:49:20Z")

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Yes, the mesh `initial_condition` is a mesh that covers the entire simulation domain and `top_cigar_lake` is a boundary mesh.