diff --git a/moose/kernels.py b/moose/kernels.py
index 7eb490f..7b5e4c3 100644
--- a/moose/kernels.py
+++ b/moose/kernels.py
@@ -158,7 +158,7 @@ def __str__(self):
         string  = f'[{self.name}]\n'
         string += f'type={self.aux_kernel_type.name}\n'
         string += f'variable={self.variable.name}\n'
-        string += f'{self.function.__str__()}'
+        string += f'function={self.function.__str__()}\n'
         string += f'args={self.args.name}\n'
         string += '[]\n'
         return string
diff --git a/moose/mesh.py b/moose/mesh.py
index daaa5a2..b8a28ea 100644
--- a/moose/mesh.py
+++ b/moose/mesh.py
@@ -88,11 +88,14 @@ def __str__(self):
     def add_mesh_object(self, name = "", type = None, **kwargs):
         if name in self.mesh_objects.keys():
             print (f'name {name} already in use')
-
+            
+        mesh = None  # Add a default value for the 'mesh' variable
+        
         if type == MeshObjectTypes.FileMeshGenerator:
             mesh = FileMeshGenerator(name=name, **kwargs)
         elif type == MeshObjectTypes.TransformGenerator:
             mesh = TransformGenerator(name=name, **kwargs)
         
-        self.mesh_objects[name] = mesh
-        
\ No newline at end of file
+        if mesh is not None:
+            self.mesh_objects[name] = mesh
+