diff --git a/gprMax/config.py b/gprMax/config.py
index c1243c98..67a0802d 100644
--- a/gprMax/config.py
+++ b/gprMax/config.py
@@ -209,9 +209,9 @@ class SimulationConfig:
                         'subgrid': False,
                         'precision': 'single'}
 
-        # Progress bars on stdoout or not - switch off progressbars
-        # when > basic logging level is used
-        self.general['progressbars'] = False if logging.root.level > 20 else True
+        # Progress bars on stdoout or not - switch off progressbars when
+        # logging level is greater than info (20)
+        self.general['progressbars'] = False if args.log_level > 20 else True
 
         self.em_consts = {'c': c, # Speed of light in free space (m/s)
                           'e0': e0, # Permittivity of free space (F/m)
@@ -315,7 +315,7 @@ class SimulationConfig:
         self.vtk_byteorder = 'LittleEndian' if sys.byteorder == 'little' else 'BigEndian'
 
     def _set_single_model(self):
-        if self.model_start == 0 and self.model_end == 1:
+        if self.model_end - self.model_start == 1:
             self.single_model = True
         else:
             self.single_model = False