Added a check

Author: mesonepigreco

Modules/SchaMinimizer.py

@@ -898,6 +898,9 @@ def init(self, verbosity = False, delete_previous_data = True):
             delete_previous_data : bool
                 If true, it will clean previous minimizations from the free energies, gradients...
         """
+
+        if (not self.minim_dyn) and (not self.minim_struct):
+            raise ValueError("Error, either one of minim_dyn or minim_struct should be True.")
 
         # Check the ensemble size
         if not self.ensemble.structures: