diff --git a/src/solver/modeler/api/include/antares/solver/modeler/api/linearProblem.h b/src/solver/modeler/api/include/antares/solver/modeler/api/linearProblem.h
index 17cd8c6f8b..dffc7f874c 100644
--- a/src/solver/modeler/api/include/antares/solver/modeler/api/linearProblem.h
+++ b/src/solver/modeler/api/include/antares/solver/modeler/api/linearProblem.h
@@ -72,7 +72,7 @@ class ILinearProblem
     /// Solve the problem, returns a IMipSolution
     virtual IMipSolution* solve(bool verboseSolver) = 0;
 
-    virtual void Write(const std::string& filename) = 0;
+    virtual void WriteLP(const std::string& filename) = 0;
 
     // Definition of infinity
     virtual double infinity() const = 0;
diff --git a/src/solver/modeler/main.cpp b/src/solver/modeler/main.cpp
index 4b52470f83..43bfc19593 100644
--- a/src/solver/modeler/main.cpp
+++ b/src/solver/modeler/main.cpp
@@ -83,9 +83,9 @@ int main(int argc, const char** argv)
 
         if (!parameters.noOutput)
         {
-            logs.info() << "Writing problem.mps...";
-            auto mps_path = std::filesystem::current_path() / "problem.mps";
-            pb.Write(mps_path.c_str());
+            logs.info() << "Writing problem.lp...";
+            auto mps_path = std::filesystem::current_path() / "problem.lp";
+            pb.WriteLP(mps_path.c_str());
         }
 
         logs.info() << "Launching resolution...";
diff --git a/src/solver/modeler/ortoolsImpl/include/antares/solver/modeler/ortoolsImpl/linearProblem.h b/src/solver/modeler/ortoolsImpl/include/antares/solver/modeler/ortoolsImpl/linearProblem.h
index 4cf5b72e90..f4a2fed61e 100644
--- a/src/solver/modeler/ortoolsImpl/include/antares/solver/modeler/ortoolsImpl/linearProblem.h
+++ b/src/solver/modeler/ortoolsImpl/include/antares/solver/modeler/ortoolsImpl/linearProblem.h
@@ -65,7 +65,7 @@ class OrtoolsLinearProblem: public Api::ILinearProblem
     bool isMaximization() const override;
 
     OrtoolsMipSolution* solve(bool verboseSolver) override;
-    void Write(const std::string& filename) override;
+    void WriteLP(const std::string& filename) override;
 
     double infinity() const override;
 
diff --git a/src/solver/modeler/ortoolsImpl/linearProblem.cpp b/src/solver/modeler/ortoolsImpl/linearProblem.cpp
index df07989c29..20c302c9fd 100644
--- a/src/solver/modeler/ortoolsImpl/linearProblem.cpp
+++ b/src/solver/modeler/ortoolsImpl/linearProblem.cpp
@@ -20,6 +20,7 @@
  */
 
 #include <exception>
+#include <fstream>
 #include <memory>
 #include <ortools/linear_solver/linear_solver.h>
 
@@ -165,9 +166,12 @@ bool OrtoolsLinearProblem::isMaximization() const
     return objective_->maximization();
 }
 
-void OrtoolsLinearProblem::Write(const std::string& filename)
+void OrtoolsLinearProblem::WriteLP(const std::string& filename)
 {
-    mpSolver_->Write(filename);
+    std::string out;
+    mpSolver_->ExportModelAsLpFormat(false, &out);
+    std::ofstream of(filename);
+    of << out;
 }
 
 MPSolver* OrtoolsLinearProblem::MpSolver() const