# Fortran initializing data through precice fails

**URL:** <https://precice.discourse.group/t/fortran-initializing-data-through-precice-fails/2644>\
**Category:** Using preCICE\
**Created:** [October 14, 2025, 6:02pm UTC](https://precice.discourse.group/t/fortran-initializing-data-through-precice-fails/2644 "2025-10-14T18:02:26Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Justin\_Schoppe](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/justin_schoppe/32/2988_2.png) [@Justin\_Schoppe](https://precice.discourse.group/u/Justin_Schoppe)\
**Post date:** [October 14, 2025, 6:02pm UTC](https://precice.discourse.group/t/fortran-initializing-data-through-precice-fails/2644/1 "2025-10-14T18:02:26Z")

</div>

Hello,

I am trying to initialize pressure data between my fluid solver and abaqus using the fortran bindings but precice throws an unhandled error if I call initialize after writing pressure data here is a brief over view of what I am doing:

```fortran
call precicef_create("uns3d", configFileName, &
    & myid, ncpu, &
    & 5, 64)
    ! Tell precice which nodes the processor is holding
call precicef_set_vertices("uns3dMesh", n_bound_nodes, x0, ids, 9)
call precicef_set_mesh_triangles("uns3dMesh", n_bface, boundary_tri, 9)
call precicef_write_data("uns3dMesh", "Pressure", n_bound_nodes, ids, &
    & pressure, 9, 8)
call precicef_initialize() ! <-- fails here
call precicef_read_data("uns3dMesh", "Displacements", n_bound_nodes, ids, &
        & 0d0, disp, 9, &
        & 13)

```

```xml
<?xml version="1.0" encoding="UTF-8"?>
<precice-configuration>
    <log enabled="true">
        <sink type="stream" output="stdout" format="(%Rank%) [%Module%]:%Line% in %Function%: %ColorizedSeverity%%Message%" filter="(%Severity% = debug) and not ((%Severity% = info) and (%Rank% != 0))" enabled="true"/>
    </log>
    <!-- <profiling synchronize="true" /> -->
    <data:vector name="Displacements"/>
    <data:scalar name="Pressure"/>

    <mesh name="uns3dMesh" dimensions="3">
        <use-data name="Displacements"/>
        <use-data name="Pressure"/>
    </mesh>
    <mesh name="Abaqus-FSI-Surface" dimensions="3">
        <use-data name="Displacements"/>
        <use-data name="Pressure"/>
    </mesh>

    <participant name="uns3d">
        <provide-mesh name="uns3dMesh" />
        <write-data name="Pressure" mesh="uns3dMesh"/>
        <read-data name="Displacements" mesh="uns3dMesh"/>
    </participant>

    <participant name="Abaqus">
      <provide-mesh name="Abaqus-FSI-Surface" />
      <receive-mesh name="uns3dMesh" from="uns3d"/>
      <read-data name="Pressure" mesh="Abaqus-FSI-Surface"/>      
      <write-data name="Displacements" mesh="Abaqus-FSI-Surface"/>
      <mapping:nearest-neighbor direction="write" from="Abaqus-FSI-Surface" to="uns3dMesh" constraint="conservative">
      </mapping:nearest-neighbor >
      <mapping:nearest-projection direction="read" from="uns3dMesh" to="Abaqus-FSI-Surface" constraint="consistent">
      </mapping:nearest-projection >
    </participant>

    <m2n:sockets acceptor="uns3d" connector="Abaqus" network="ib0" exchange-directory="/scratch/user/justin.schoppe/uns3d/7.0.0/test/"/>

    <coupling-scheme:serial-explicit>
        <participants first="uns3d" second="Abaqus"/>
        <time-window-size value="-1" method="first-participant"/>
        <max-time-windows value="100000"/>
        <exchange data="Displacements" mesh="uns3dMesh" from="Abaqus" to="uns3d"/>
        <exchange data="Pressure" mesh="uns3dMesh" from="uns3d" to="Abaqus" initialize="yes"/> <!-- tried True and yes neither worked -->
    </coupling-scheme:serial-explicit>
</precice-configuration>

```

The only error I get is “Abort trap signal”

Any help is appreciated,

Thank you!

---

<div class="post-metadata">

**Author:** ![Justin\_Schoppe](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/justin_schoppe/32/2988_2.png) [@Justin\_Schoppe](https://precice.discourse.group/u/Justin_Schoppe)\
**Post date:** [October 15, 2025, 2:26pm UTC](https://precice.discourse.group/t/fortran-initializing-data-through-precice-fails/2644/2 "2025-10-15T14:26:32Z")

</div>

I found the issue I need to add the check for initialize before writing.

```fortran
call precicef_requires_initial_data(require_init)

```

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/precice/original/1X/67d2a5fa6f80e597e2267ff17fa8c1673cd11caa.svg) [@system](https://precice.discourse.group/u/system)\
**Post date:** [October 28, 2025, 9:25am UTC](https://precice.discourse.group/t/fortran-initializing-data-through-precice-fails/2644/3 "2025-10-28T09:25:59Z")

</div>

Closed on October 28, 2025, 9:25am UTC

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