diff --git a/pyerrors/input/hadrons.py b/pyerrors/input/hadrons.py
index 2e9b52d4..b5229f8a 100644
--- a/pyerrors/input/hadrons.py
+++ b/pyerrors/input/hadrons.py
@@ -143,9 +143,9 @@ def read_Bilinear_hd5(path, filestem, ens_id, order='F'):
             else:
                 mom_in = np.array(str(file['Bilinear/Bilinear_' + str(i) + '/info'].attrs['pIn'])[3:-2].strip().split(' '), dtype=int)
             if mom_out is not None:
-                assert np.allclose(mom_out, np.array(str(file['Bilinear/Bilinear_' + str(i) + '/info'].attrs['pIn'])[3:-2].strip().split(' '), dtype=int))
+                assert np.allclose(mom_out, np.array(str(file['Bilinear/Bilinear_' + str(i) + '/info'].attrs['pOut'])[3:-2].strip().split(' '), dtype=int))
             else:
-                mom_out = np.array(str(file['Bilinear/Bilinear_' + str(i) + '/info'].attrs['pIn'])[3:-2].strip().split(' '), dtype=int)
+                mom_out = np.array(str(file['Bilinear/Bilinear_' + str(i) + '/info'].attrs['pOut'])[3:-2].strip().split(' '), dtype=int)
 
         file.close()
 
diff --git a/pyerrors/pyerrors.py b/pyerrors/pyerrors.py
index 1c8699a0..9e8388e9 100644
--- a/pyerrors/pyerrors.py
+++ b/pyerrors/pyerrors.py
@@ -34,7 +34,7 @@ class Obs:
                     ensemble.
     N_sigma_global -- Standard value for N_sigma (default 1.0)
     """
-    # __slots__ = ['names', 'shape', 'r_values', 'deltas', 'N', 'value', 'dvalue',
+    # __slots__ = ['names', 'shape', 'r_values', 'deltas', 'N', '_value', '_dvalue',
     #              'ddvalue', 'reweighted', 'S', 'tau_exp', 'N_sigma', 'e_names',
     #              'e_content', 'e_dvalue', 'e_ddvalue', 'e_tauint', 'e_dtauint',
     #              'e_windowsize', 'e_rho', 'e_drho', 'e_n_tauint', 'e_n_dtauint',
@@ -152,7 +152,7 @@ class Obs:
         self.e_rho = {}
         self.e_drho = {}
         self._dvalue = 0
-        self._ddvalue = 0
+        self.ddvalue = 0
 
         self.S = {}
         self.tau_exp = {}