# SI³: EAP rheology broken? Segmentation fault with ln\_rhg\_EAP = .TRUE

**URL:** <https://nemo-ocean.discourse.group/t/si-eap-rheology-broken-segmentation-fault-with-ln-rhg-eap-true/1035>\
**Category:** Uncategorized\
**Tags:** SI3, ICE\
**Created:** [24 June 2026 09:56 UTC](https://nemo-ocean.discourse.group/t/si-eap-rheology-broken-segmentation-fault-with-ln-rhg-eap-true/1035 "2026-06-24T09:56:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jraylmer](https://avatars.discourse-cdn.com/v4/letter/j/c0e974/32.png) [@jraylmer](https://nemo-ocean.discourse.group/u/jraylmer)\
**Post date:** [24 June 2026 09:56 UTC](https://nemo-ocean.discourse.group/t/si-eap-rheology-broken-segmentation-fault-with-ln-rhg-eap-true/1035/1 "2026-06-24T09:56:14Z")

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There seems to be a technical issue with the EAP rheology scheme. When activating this scheme in a basic reference configuration with no code modifications, I am getting a segmentation fault when activating this scheme.

Steps to reproduce:

1. Compile and prepare the `ORCA2_ICE_PISCES` reference configuration
2. In `namelist_ice_cfg`, in namelist group `&namdyn_rhg` set `ln_rhg_EVP = .FALSE.` and `ln_rhg_EAP = .TRUE.`
3. Run a test simulation

The simulation runs normally when step 2 is omitted.

I get the same results in:

- Main branch ([#a7fa5ddf](https://forge.nemo-ocean.eu/nemo/nemo/-/commit/a7fa5ddf77c45462c85255d580095fd38a01d61b))
- `branch_5.0` ([#11292471](https://forge.nemo-ocean.eu/nemo/nemo/-/commit/11292471c87615a3912611cc0e6e8bf1c2b62b46))
- Version 5.0.2 release ([#dcc7fb8c](https://forge.nemo-ocean.eu/nemo/nemo/-/commit/dcc7fb8c1779fa8409e41e4ce3ab7d45b9ceb796))