diff --git a/python/py_akantu.cc b/python/py_akantu.cc
index baec2e229..1f14e6fa8 100644
--- a/python/py_akantu.cc
+++ b/python/py_akantu.cc
@@ -1,90 +1,90 @@
 /* -------------------------------------------------------------------------- */
 #include "aka_config.hh"
 /* -------------------------------------------------------------------------- */
 #include "py_aka_common.hh"
 #include "py_aka_error.hh"
 #include "py_boundary_conditions.hh"
 #include "py_fe_engine.hh"
 #include "py_group_manager.hh"
 #include "py_mesh.hh"
 #include "py_model.hh"
 #include "py_parser.hh"
 
 #if defined(AKANTU_USE_IOHELPER)
 #include "py_dumpable.hh"
 #endif
 
 #if defined(AKANTU_SOLID_MECHANICS)
 #include "py_material.hh"
 #include "py_solid_mechanics_model.hh"
 #endif
 
 #if defined(AKANTU_HEAT_TRANSFER)
 #include "py_heat_transfer_model.hh"
 #endif
 
 #if defined(AKANTU_COHESIVE_ELEMENT)
 #include "py_solid_mechanics_model_cohesive.hh"
 #endif
 /* -------------------------------------------------------------------------- */
 #include <aka_error.hh>
 /* -------------------------------------------------------------------------- */
 #include <pybind11/pybind11.h>
 /* -------------------------------------------------------------------------- */
 #include <iostream>
 /* -------------------------------------------------------------------------- */
 
 namespace py = pybind11;
 
 namespace akantu {
 void register_all(pybind11::module & mod) {
   register_initialize(mod);
   register_enums(mod);
   register_error(mod);
   register_functions(mod);
   register_parser(mod);
 
   register_group_manager(mod);
 #if defined(AKANTU_USE_IOHELPER)
   register_dumpable(mod);
 #endif
   register_mesh(mod);
 
   register_fe_engine(mod);
 
   register_boundary_conditions(mod);
   register_model(mod);
 #if defined(AKANTU_HEAT_TRANSFER)
   register_heat_transfer_model(mod);
 #endif
 
 #if defined(AKANTU_SOLID_MECHANICS)
   register_solid_mechanics_model(mod);
   register_material(mod);
 #endif
 
 #if defined(AKANTU_COHESIVE_ELEMENT)
   register_solid_mechanics_model_cohesive(mod);
 #endif
 }
 } // namespace akantu
 
 /* -------------------------------------------------------------------------- */
 /* -------------------------------------------------------------------------- */
 PYBIND11_MODULE(py11_akantu, mod) {
   mod.doc() = "Akantu python interface";
 
   static py::exception<akantu::debug::Exception>
       akantu_exception(mod, "Exception");
 
   py::register_exception_translator([](std::exception_ptr ptr) {
     try {
       if (ptr)
         std::rethrow_exception(ptr);
     } catch (akantu::debug::Exception & e) {
-      akantu_exception(sstr.str().c_str());
+      akantu_exception(e.what());
     }
   });
 
   akantu::register_all(mod);
 } // Module akantu