When using the CHT module with the OpenFOAM adapter, the data type settings of the '0' folder of the three-participant solid-solid-fluid coupling is uncertain,and my settings are errors

my system:Ubuntu 20.04.4
preCICE:v2.4.0
OpenFOAM:v2006
OpenFOAM-adapter-v1.0.0
participants:fuel(solid)–cladding(solid)–coolant(liquid)

I don’t know how to set the '0–T’folder type for the participant
OpenFOAM:cladding:'0’folder:“T”

‘’'FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 0 0 1 0 0 0];

internalField uniform 700;

boundaryField
{
fuelwall
{
type fixedGradient;
gradient uniform 0;
}
claddinginlet
{
type zeroGradient;
}
claddingoutlet
{
type zeroGradient;
}
claddingwall
{
type fixedValue;
value $internalField;
}

}

// ************************************************************************* //‘’’

log:
‘’'xie@xie-Z790-D:~/OpenFOAM/xie-v2006/run/tlk/CHT-Nuclear-couplling/222-fixgradient/cladding-openfoam$ mpirun -np 2 laplacianFoam -parallel |tee log
/---------------------------------------------------------------------------
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: v2006 |
| \ / A nd | Website: www.openfoam.com |
| \/ M anipulation | |
*---------------------------------------------------------------------------*/
Build : v2006 OPENFOAM=2006
Arch : “LSB;label=32;scalar=64”
Exec : laplacianFoam -parallel
Date : Dec 07 2024
Time : 15:33:20
Host : xie-Z790-D
PID : 837252
I/O : uncollated
Case : /home/xie/OpenFOAM/xie-v2006/run/tlk/CHT-Nuclear-couplling/222-fixgradient/cladding-openfoam
nProcs : 2
Hosts :
(
(xie-Z790-D 2)
)
Pstream initialized with:
floatTransfer : 0
nProcsSimpleSum : 0
commsType : nonBlocking
polling iterations : 0
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20)
allowSystemOperations : Allowing user-supplied system call operations

Create time

Create mesh for time = 0

SIMPLE: no convergence criteria found. Calculations will run for 0.3 steps.

Reading field T

Reading diffusivity DT

No finite volume options present

Calculating temperature distribution

—[preciceAdapter] Loaded the OpenFOAM-preCICE adapter v1.0.0.
—[preciceAdapter] Reading preciceDict…
—[precice] This is preCICE version 2.4.0
—[precice] Revision info: no-info [Git failed/Not a repository]
—[precice] Build type: Release (without debug log)
—[precice] Configuring preCICE with configuration “…/precice-config.xml”
—[precice] I am participant “cladding”
—[precice] Connecting Primary rank to 1 SecondaryRanks
—[precice] Setting up primary communication to coupling partner/s
—[precice] Primary ranks are connected
—[precice] Setting up preliminary secondary communication to coupling partner/s
—[precice] Prepare partition for mesh cladding-to-fuel-Mesh
—[precice] Prepare partition for mesh cladding-to-liquid-Mesh
—[precice] Gather mesh cladding-to-liquid-Mesh
—[precice] Send global mesh cladding-to-liquid-Mesh
—[precice] Receive global mesh fuel-Mesh
—[precice] Receive global mesh liquid-Mesh
—[precice] Broadcast mesh fuel-Mesh
—[precice] Filter mesh fuel-Mesh by bounding box on secondary ranks
—[precice] Mapping distance min:7.83971e-06 max:0.000249152 avg: 0.000126059 var: 5.17308e-09 cnt: 5040
—[precice] Filter mesh fuel-Mesh by mappings
—[precice] Feedback distribution for mesh fuel-Mesh
—[precice] Broadcast mesh liquid-Mesh
—[precice] Filter mesh liquid-Mesh by bounding box on secondary ranks
—[precice] Mapping distance min:6.01013e-06 max:0.000249098 avg: 0.000125419 var: 5.11197e-09 cnt: 6280
—[precice] Filter mesh liquid-Mesh by mappings
—[precice] Feedback distribution for mesh liquid-Mesh
—[precice] Setting up secondary communication to coupling partner/s
—[precice] Secondary ranks are connected
—[precice] liquid: iteration: 1, time-window: 1, time: 0 of 1, time-window-size: 0.0001, max-timestep-length: 0.0001, ongoing: yes, time-window-complete: no, write-initial-data
fuel: iteration: 1, time-window: 1, time: 0 of 1, time-window-size: 0.0001, max-timestep-length: 0.0001, ongoing: yes, time-window-complete: no,
→ FOAM Warning :
From void adapterInfo(std::string, std::string)
in file Utilities.C at line 50
Error (deferred - will exit later) in the preCICE adapter:
Attempt to cast type fixedGradient to type fixedValue

Time = 0.0001

DICPCG: Solving for T, Initial residual = 0.595024, Final residual = 8.40796e-07, No Iterations 37
DICPCG: Solving for T, Initial residual = 0.537021, Final residual = 7.1532e-07, No Iterations 36
DICPCG: Solving for T, Initial residual = 0.521095, Final residual = 7.09068e-07, No Iterations 36
ExecutionTime = 0.35 s ClockTime = 51 s

[0]
[0]
[0] → FOAM FATAL ERROR:
[0] [1]
[1]
[1] → FOAM FATAL ERROR:
[1] Error in the preCICE adapter:
There was a problem while configuring the adapter. See the log for details.
[1]
[1]
[1] From void adapterInfo(std::string, std::string)
[1] in file Utilities.C at line 32Error in the preCICE adapter:
There was a problem while configuring the adapter. See the log for details.
[0]
[0]
[0] From void adapterInfo(std::string, std::string)
[0] in file Utilities.C at line 32.
[0]
FOAM parallel run exiting
[0]
.
[1]
FOAM parallel run exiting
[1]

MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
with errorcode 1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.

[xie-Z790-D:837247] 1 more process has sent help message help-mpi-api.txt / mpi-abort’‘’