diff --git a/pymodule/pycatima.cpp b/pymodule/pycatima.cpp
index 539f30b..512d441 100644
--- a/pymodule/pycatima.cpp
+++ b/pymodule/pycatima.cpp
@@ -100,6 +100,7 @@ py::dict get_result_dict(const Result& r){
                     d["sigma_E"] = r.sigma_E;
                     d["sigma_r"] = r.sigma_r;
                     d["sigma_a"] = r.sigma_a;
+                    d["sigma_x"] = r.sigma_x;
                     d["tof"] = r.tof;
                     d["sp"] = r.sp;
                     return d;
@@ -171,6 +172,7 @@ PYBIND11_MODULE(pycatima,m){
              .def_readwrite("sigma_E", &Result::sigma_E)
              .def_readwrite("sigma_a", &Result::sigma_a)
              .def_readwrite("sigma_r", &Result::sigma_r)
+             .def_readwrite("sigma_x", &Result::sigma_x)
              .def_readwrite("tof", &Result::tof)
              .def_readwrite("sp", &Result::sp)
              .def("get_dict",&get_result_dict);
diff --git a/tests/test2.py b/tests/test2.py
deleted file mode 100644
index af6c087..0000000
--- a/tests/test2.py
+++ /dev/null
@@ -1,309 +0,0 @@
-import sys
-sys.path.insert(0,"../build")
-import unittest
-import pycatima as catima
-import math
-
-class TestStructures(unittest.TestCase):
-
-    def test_Projectile(self):
-        print(catima.storage_info())
-        p = catima.Projectile(238,92)
-        self.assertEqual(p.A(),238)
-        self.assertEqual(p.Z(),92)
-        self.assertEqual(p.Q(),92)
-
-        p = catima.Projectile(238,92,90)
-        self.assertEqual(p.A(),238)
-        self.assertEqual(p.Z(),92)
-        self.assertEqual(p.Q(),90)
-        p.T(1000)
-        self.assertEqual(p.T(),1000)
-        p(500)
-        self.assertEqual(p.T(),500)
-
-        p = catima.Projectile(238,92,90, T=100)
-        self.assertEqual(p.T(),100)
-    
-    def test_Material(self):
-        mat = catima.Material()
-        mat.add_element(12,6,1)
-        self.assertEqual(mat.ncomponents(),1)
-        mat.add_element(1,1,2)
-        self.assertEqual(mat.ncomponents(),2)
-
-        mat2 = catima.Material([[12.01,6,1]])
-        self.assertEqual(mat2.ncomponents(),1)
-        self.assertEqual(mat2.molar_mass(),12.01)
-
-        mat3 = catima.Material([[12,6,1]])
-        self.assertEqual(mat3.ncomponents(),1)
-        self.assertEqual(mat3.molar_mass(),12)
-
-        Water = catima.Material([[1,1,2],[16,8,1]])
-        self.assertEqual(Water.molar_mass(),18)
-
-        mat2 = catima.Material([[0,6,1]])
-        self.assertEqual(mat2.ncomponents(),1)
-        self.assertAlmostEqual(mat2.molar_mass(),12,1)
-
-        mat5 = catima.Material([[0,6,1]],density=1.9, thickness=0.5)
-        self.assertEqual(mat5.ncomponents(),1)
-        self.assertEqual(mat5.thickness(),0.5)
-        self.assertEqual(mat5.density(),1.9)
-
-        mat6 = catima.Material([[0,6,1]],density=1.9, thickness=0.5,i_potential=80.0)
-        self.assertEqual(mat6.ncomponents(),1)
-        self.assertEqual(mat6.thickness(),0.5)
-        self.assertEqual(mat6.density(),1.9)
-        self.assertEqual(mat6.I(),80.0)
-
-        # copy
-        mat3.density(1.8)
-        matc = mat3.copy()
-        self.assertEqual(matc.ncomponents(),1)
-        self.assertEqual(matc.molar_mass(),12)
-        self.assertEqual(matc.density(),1.8)
-        mat3.density(2.0)
-        self.assertEqual(matc.density(),1.8)
-        self.assertEqual(mat3.density(),2.0)
-
-    
-    def test_default_material(self):
-        m1 = catima.get_material(6);
-        self.assertAlmostEqual(m1.molar_mass(),12,1)
-        self.assertEqual(m1.ncomponents(),1)
-        self.assertAlmostEqual(m1.density(),2.0,1)
-
-        m2 = catima.get_material(catima.material.Water)
-        self.assertEqual(m2.ncomponents(),2)
-        self.assertAlmostEqual(m2.molar_mass(),18,1)
-        self.assertAlmostEqual(m2.density(),1.0,1)
-
-        m3 = catima.get_material(3001)
-        self.assertEqual(m3.ncomponents(),0)
-        self.assertAlmostEqual(m3.molar_mass(),0,1)
-        self.assertAlmostEqual(m3.density(),0.0,1)
-
-    def test_layers(self):
-        graphite = catima.get_material(6)
-        graphite.thickness(0.5)
-        p10 = catima.get_material(catima.material.P10)
-        p10.thickness(0.01)
-        n2 = catima.get_material(7)
-        n2.thickness(0.02)
-
-        mat= catima.Layers()
-        self.assertEqual(mat.num(),0)
-        mat.add(graphite)
-        self.assertEqual(mat.num(),1)
-        self.assertAlmostEqual(mat[0].molar_mass(),12,1)
-        self.assertAlmostEqual(mat[0].thickness(),0.5,1)
-        self.assertAlmostEqual(mat[0].density(),2.0,1)
-        
-        mat.add(p10)
-        self.assertEqual(mat.num(),2)
-
-        graphite.thickness(1.0)
-        graphite.density(1.8)
-        mat.add(graphite)
-        self.assertEqual(mat.num(),3)
-        self.assertAlmostEqual(mat[2].molar_mass(),12,1)
-        self.assertAlmostEqual(mat[0].thickness(),0.5,1)
-        self.assertAlmostEqual(mat[0].density(),2.0,1)
-        self.assertAlmostEqual(mat[2].thickness(),1.0,1)
-        self.assertAlmostEqual(mat[2].density(),1.8,1)
-        mat[2].thickness(1.2)
-        mat[2].density(1.9)
-        self.assertAlmostEqual(mat.materials[2].thickness(),1.2,1)
-        self.assertAlmostEqual(mat.materials[2].density(),1.9,1)
-        #self.assertAlmostEqual(mat.materials[0].thickness(),0.5,1)
-        #self.assertAlmostEqual(mat.materials[0].density(),2.0,1)
-        self.assertEqual(mat[3],None)
-        self.assertEqual(mat["a"],None)
-
-        mat2 = catima.Layers()
-        mat2.add(n2)
-        self.assertEqual(mat2.num(),1)
-
-        mats = mat2 + mat
-        self.assertEqual(mats.num(),4)
-        self.assertAlmostEqual(mats[0].molar_mass(),14,1)
-        self.assertEqual(mats[0].thickness(),0.02)
-        self.assertAlmostEqual(mats[1].molar_mass(),12,1)
-        self.assertAlmostEqual(mats[3].molar_mass(),12,1)
-
-        n2.thickness(0.5)
-        mats = mats + n2
-        self.assertEqual(mats.num(),5)
-        self.assertAlmostEqual(mats[0].molar_mass(),14,1)
-        self.assertEqual(mats[0].thickness(),0.02)
-        self.assertAlmostEqual(mats[4].molar_mass(),14,1)
-        self.assertEqual(mats[4].thickness(),0.5)
-
-    def test_material_calculation(self):
-        Water = catima.get_material(catima.material.Water)
-        p = catima.Projectile(1,1)
-        
-        p(1000)
-        res = catima.calculate(p,Water)
-        res2 = catima.dedx(p,Water)
-        self.assertAlmostEqual(res.dEdxi,2.23,1)
-        self.assertAlmostEqual(res["dEdxi"],2.23,1)
-        self.assertAlmostEqual(res.dEdxi,res2,3)
-        res = catima.calculate(p(500),Water)
-        res2 = catima.dedx(p,Water)
-        self.assertAlmostEqual(res.dEdxi,2.76,1)
-        self.assertAlmostEqual(res.dEdxi,res2,3)
-
-        res = catima.calculate(p(9),Water)
-        res2 = catima.dedx(p,Water)
-        self.assertAlmostEqual(res.dEdxi,51.17,1)
-        self.assertAlmostEqual(res.dEdxi,res2,3)
-        res = catima.calculate(p(9),Water)
-        res = catima.calculate(p(9),Water)
-        self.assertAlmostEqual(res.dEdxi,51.17,1)
-        
-        p(900000)
-        res = catima.calculate(p,Water)
-        res2 = catima.dedx_from_range(p,Water)
-        self.assertAlmostEqual(res.dEdxi,res2,3)
-        
-    def test_config(self):
-        Water = catima.get_material(catima.material.Water)
-        Water.density(1.0)
-        Water.thickness(1.0)
-        p = catima.Projectile(1,1)
-        conf = catima.Config()
-        conf.dedx_straggling = catima.omega_type.bohr
-        conf2 = catima.Config()
-        conf2.dedx_straggling = catima.omega_type.atima
-        p(1000)
-        res = catima.calculate(p,Water,config=conf)
-        res2 = catima.calculate(p,Water,config=conf2)
-        self.assertAlmostEqual(res.dEdxi,res2.dEdxi,delta=1e-6)
-        self.assertNotAlmostEqual(res.sigma_E,res2.sigma_E,delta=1e-4)
-        self.assertNotAlmostEqual(res.sigma_r,res2.sigma_r,delta=1e-4)
-        
-    
-    def test_eout(self):
-        graphite = catima.get_material(6)
-        graphite.thickness(0.5)
-        p = catima.Projectile(12,6)
-        res = catima.calculate(p(1000),graphite)
-        res2 = catima.energy_out(p(1000),graphite)
-        self.assertAlmostEqual(res.Eout,997.077,1)
-        self.assertAlmostEqual(res["Eout"],997.077,1)
-        self.assertAlmostEqual(res.Eout,res2,3)
-    
-    def test_eout_list(self):
-        graphite = catima.get_material(6)
-        graphite.thickness(0.5)
-        p = catima.Projectile(12,6)
-        energies = [100,500,1000]
-        res = catima.calculate(p(1000),graphite)
-        self.assertAlmostEqual(res.Eout,997.077,1)
-        res2 = catima.energy_out(p,graphite,energy=energies)
-        self.assertEqual(len(res2),len(energies))
-        self.assertAlmostEqual(res2[2], 997.077,1)
-        self.assertAlmostEqual(res2[0], catima.calculate(p(energies[0]),graphite).Eout ,1)
-        self.assertAlmostEqual(res2[1], catima.calculate(p(energies[1]),graphite).Eout ,1)
-    
-    def test_dedx_from_range_list(self):
-        graphite = catima.get_material(6)
-        graphite.thickness(0.5)
-        p = catima.Projectile(12,6)
-        energies = [100,500,1000]
-        res2 = catima.dedx_from_range(p,graphite,energy=energies)
-        self.assertEqual(len(res2),len(energies))
-        self.assertEqual(len(res2),3)
-        for i,e in enumerate(energies):
-            r = catima.dedx_from_range(p, graphite, energy=e)
-            print(r)
-            print(res2)
-            self.assertAlmostEqual(res2[i], r, 0.1)
-
-    def test_layer_calculation(self):
-        p = catima.Projectile(12,6)
-        Water = catima.get_material(catima.material.Water)
-        Water.thickness(10.0)
-        graphite = catima.get_material(6)
-        graphite.thickness(1.0)
-        graphite.density(2.0)
-
-        mat = catima.Layers()
-        mat.add(Water)
-        mat.add(graphite)
-        res = catima.calculate_layers(p(1000),mat)
-        self.assertEqual(len(res.results),2)
-        self.assertAlmostEqual(res.total_result.Eout,926.3,1)
-        self.assertAlmostEqual(res.total_result.sigma_a,0.00269,1)
-        self.assertAlmostEqual(res["Eout"],926.3,1)
-        self.assertAlmostEqual(res["sigma_a"],0.00269,4)
-        self.assertAlmostEqual(res["tof"],0.402,2)
-        self.assertAlmostEqual(res["Eloss"],884,0)
-
-        self.assertAlmostEqual(res[0]["Eout"],932.24,0)
-        self.assertAlmostEqual(res[1]["Eout"],926.3,0)
-        self.assertAlmostEqual(res[0]["sigma_a"],0.00258,4)
-        self.assertAlmostEqual(res[1]["sigma_a"],0.000774,4)
-        self.assertAlmostEqual(res[0]["range"],107.1,0)
-        self.assertAlmostEqual(res[1]["range"],111.3,0)
-    
-    def test_energy_table(self):
-        table = catima.get_energy_table()
-        self.assertEqual(table[0],math.log(catima.logEmin))
-        #self.assertEqual(table[10],catima.energy_table(10))
-        self.assertEqual(len(table),catima.max_datapoints)
-        
-    def test_storage(self):
-        p = catima.Projectile(12,6)
-        Water = catima.get_material(catima.material.Water)
-        Water.thickness(10.0)
-        graphite = catima.get_material(6)
-        graphite.thickness(1.0)
-        
-        data = catima.get_data(p, Water)
-        print(data[0])
-        et = catima.get_energy_table()
-        
-        self.assertEqual(len(data),3)
-        self.assertEqual(len(data[0]),len(et))
-        self.assertEqual(len(data[0]),catima.max_datapoints)
-        
-        res = catima.calculate(p(et[10]),Water)
-        self.assertAlmostEqual(res.range,data[0][10],6)
-        self.assertAlmostEqual(catima.projectile_range(p,Water),data[0][10],6)
-        #self.assertAlmostEqual(catima.domega2de(p,Water),data[1][10],6)
-        
-        res = catima.calculate(p(et[100]),Water)
-        self.assertAlmostEqual(res.range,data[0][100],6)
-        self.assertAlmostEqual(catima.projectile_range(p,Water),data[0][100],6)
-        #self.assertAlmostEqual(catima.domega2de(p,Water),data[1][100],6)
-        
-        res = catima.calculate(p(et[200]),Water)
-        self.assertAlmostEqual(res.range,data[0][200],6)
-        self.assertAlmostEqual(catima.projectile_range(p,Water),data[0][200],6)
-        #self.assertAlmostEqual(catima.domega2de(p,Water),data[1][200],6)
-        
-        res = catima.calculate(p(et[401]),Water)
-        self.assertAlmostEqual(res.range,data[0][401],6)
-        self.assertAlmostEqual(catima.projectile_range(p,Water),data[0][401],6)
-        #self.assertAlmostEqual(catima.domega2de(p,Water),data[1][401],6)
-        
-    def test_python_storage_access(self):
-        
-        p = catima.Projectile(12,6)
-        Water = catima.get_material(catima.material.Water)
-        Water.thickness(10.0)
-        graphite = catima.get_material(6)
-        graphite.thickness(1.0)
-        data = catima.get_data(p, Water)
-        self.assertEqual(catima.max_storage_data,100) # assuming 50, this has to be changed manually
-        r = catima.storage_info()
-        
-        #self.assertAlmostEqual(catima.da2de(p,Water,et[100]),data[2][100],6)
-        #self.assertAlmostEqual(catima.da2de(p,Water,et[400]),data[2][400],6)
-
-if __name__ == "__main__":
-    unittest.main()