From 2985dd20f6475e386123d71d5933f4ad8fbd0ea5 Mon Sep 17 00:00:00 2001
From: bakpaul <paul.baksic@outlook.fr>
Date: Tue, 21 Apr 2026 15:50:17 +0200
Subject: [PATCH] Acquire gil for the full scope of the lifetime returned
 matrix

---
 bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_ForceField.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_ForceField.cpp b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_ForceField.cpp
index c3ab5f9c..726fb131 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_ForceField.cpp
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_ForceField.cpp
@@ -121,7 +121,6 @@ namespace sofapython3
     template<class TDOFType>
     py::object ForceField_Trampoline<TDOFType>::_addKToMatrix(const MechanicalParams* mparams, int nIndices, int nDofs)
     {
-        PythonEnvironment::gil acquire;
 
         py::dict mp = py::dict("time"_a=getContext()->getTime(),
                                "mFactor"_a=mparams->mFactor(),
@@ -136,6 +135,8 @@ namespace sofapython3
     template<class TDOFType>
     void ForceField_Trampoline<TDOFType>::addKToMatrix(const MechanicalParams* mparams, const MultiMatrixAccessor* dfId)
     {
+        PythonEnvironment::gil acquire;
+        
         MultiMatrixAccessor::MatrixRef mref = dfId->getMatrix(this->mstate);
         sofa::linearalgebra::BaseMatrix* mat = mref.matrix;